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Ventricular valves Stock Photos and Images
Section through the heart of human embryo showing the formation of the cardiac septa and the auriculo-ventricular valves, (see 9N3690) from a somewhat more advanced embryo. Ad, As, right and left auricle; Ost, auriculo-ventricular apertures; S.s, septum superior of auricles; S. it, endocardial cushion (septum intermedium); S. if, septum infers ventriculorum, now denser and more muscular. Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/section-through-the-heart-of-human-embryo-showing-the-formation-of-the-cardiac-septa-and-the-auriculo-ventricular-valves-see-9n3690-from-a-somewhat-more-advanced-embryo-ad-as-right-and-left-auricle-ost-auriculo-ventricular-apertures-ss-septum-superior-of-auricles-s-it-endocardial-cushion-septum-intermedium-s-if-septum-infers-ventriculorum-now-denser-and-more-muscular-image246588106.htmlRMT951J2–Section through the heart of human embryo showing the formation of the cardiac septa and the auriculo-ventricular valves, (see 9N3690) from a somewhat more advanced embryo. Ad, As, right and left auricle; Ost, auriculo-ventricular apertures; S.s, septum superior of auricles; S. it, endocardial cushion (septum intermedium); S. if, septum infers ventriculorum, now denser and more muscular.
A DeBakey Ventricular Assist Device (1966) on display in the National Museum of Health and Medicine, Silver Spring, MD, USA. Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-a-debakey-ventricular-assist-device-1966-on-display-in-the-national-173176524.htmlRMM1MTBT–A DeBakey Ventricular Assist Device (1966) on display in the National Museum of Health and Medicine, Silver Spring, MD, USA.
Cardiac Cycle Phases: Systole and Diastole Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/cardiac-cycle-phases-systole-and-diastole-image558897291.htmlRF2RD7Y5F–Cardiac Cycle Phases: Systole and Diastole
illustration of human arterial and venous circulatory system Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/illustration-of-human-arterial-and-venous-circulatory-system-image602924856.htmlRF2X0WGPG–illustration of human arterial and venous circulatory system
El aparato cardiovascular, capaz de distribuir el oxígeno a través del bombeo de la sangre y canalización de la misma en función de las necesidades me Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-el-aparato-cardiovascular-capaz-de-distribuir-el-oxgeno-a-travs-del-174566029.htmlRFM404N1–El aparato cardiovascular, capaz de distribuir el oxígeno a través del bombeo de la sangre y canalización de la misma en función de las necesidades me
HEART, ILLUSTRATION Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-heart-illustration-49280591.htmlRMCT4WW3–HEART, ILLUSTRATION
Medical illustration of the phases of the cardiac cycle, with annotations. Stock Vectorhttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/medical-illustration-of-the-phases-of-the-cardiac-cycle-with-annotations-image518175982.htmlRF2N30XN2–Medical illustration of the phases of the cardiac cycle, with annotations.
HEART, ILLUSTRATION Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/heart-illustration-image230680915.htmlRMRB8BT3–HEART, ILLUSTRATION
vector illustration of correct pulse palpation Stock Vectorhttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/vector-illustration-of-correct-pulse-palpation-image247568704.htmlRFTANMBC–vector illustration of correct pulse palpation
PACEMAKER Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-pacemaker-75741274.htmlRMEB68NE–PACEMAKER
vector illustration of the position of the doctor s hands in indirect heart massage Stock Vectorhttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/vector-illustration-of-the-position-of-the-doctor-s-hands-in-indirect-heart-massage-image242440120.htmlRFT2C2RM–vector illustration of the position of the doctor s hands in indirect heart massage
HEART, ILLUSTRATION Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-heart-illustration-49285284.htmlRMCT53TM–HEART, ILLUSTRATION
The Practitioner . Fig. 8. Diagram of a heart with incompetent aortic valves. The ventricle, as well as the aorta, is under pressure during diastole, but the auricle is protected by the auriculo-ventricular valves. the matter with them. It is when the mitral valves becomeaffected, either by vegetations or puckering, which render themincapable of shutting completely, or in consequence of theauriculo-ventricular orifice becoming so dilated that the valves,however healthy they may be, are unable to close it, that theblood is thrown back upon the pulmonary veins at each con-traction of the left (F Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/the-practitioner-fig-8-diagram-of-a-heart-with-incompetent-aortic-valves-the-ventricle-as-well-as-the-aorta-is-under-pressure-during-diastole-but-the-auricle-is-protected-by-the-auriculo-ventricular-valves-the-matter-with-them-it-is-when-the-mitral-valves-becomeaffected-either-by-vegetations-or-puckering-which-render-themincapable-of-shutting-completely-or-in-consequence-of-theauriculo-ventricular-orifice-becoming-so-dilated-that-the-valveshowever-healthy-they-may-be-are-unable-to-close-it-that-theblood-is-thrown-back-upon-the-pulmonary-veins-at-each-con-traction-of-the-left-f-image342717969.htmlRM2AWG47D–The Practitioner . Fig. 8. Diagram of a heart with incompetent aortic valves. The ventricle, as well as the aorta, is under pressure during diastole, but the auricle is protected by the auriculo-ventricular valves. the matter with them. It is when the mitral valves becomeaffected, either by vegetations or puckering, which render themincapable of shutting completely, or in consequence of theauriculo-ventricular orifice becoming so dilated that the valves,however healthy they may be, are unable to close it, that theblood is thrown back upon the pulmonary veins at each con-traction of the left (F
BLOOD CIRCULATION, ILLUSTRATION Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-blood-circulation-illustration-49289110.htmlRMCT58NA–BLOOD CIRCULATION, ILLUSTRATION
The heart, it's cavities and valves. Fig. 1 - Anterior surface of Heart and Pericardial covering., Fig. 2 - Posterior surface of Heart, Auricles, and Ventricales, Fig. 3 - Internal cavities of Ventricals - anterior view, Fig. 4 - Anterior surface of Heart - interior of right auricle exposed, Fig 5 - Interior of right Auricle, Ventrical, and Pulmonary Artery, Fig. 6 - Exterior of left Ventricle and of Aorta, Fig. 7 - Transverse section of Auricles, Aorta, and Pulmonary Artery, immediately above the origins of these vessels, showing the auriculo-ventricular and arterial valves in action, Fig. 8 Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/the-heart-its-cavities-and-valves-fig-1-anterior-surface-of-heart-and-pericardial-covering-fig-2-posterior-surface-of-heart-auricles-and-ventricales-fig-3-internal-cavities-of-ventricals-anterior-view-fig-4-anterior-surface-of-heart-interior-of-right-auricle-exposed-fig-5-interior-of-right-auricle-ventrical-and-pulmonary-artery-fig-6-exterior-of-left-ventricle-and-of-aorta-fig-7-transverse-section-of-auricles-aorta-and-pulmonary-artery-immediately-above-the-origins-of-these-vessels-showing-the-auriculo-ventricular-and-arterial-valves-in-action-fig-8-image449987957.htmlRM2H42M6D–The heart, it's cavities and valves. Fig. 1 - Anterior surface of Heart and Pericardial covering., Fig. 2 - Posterior surface of Heart, Auricles, and Ventricales, Fig. 3 - Internal cavities of Ventricals - anterior view, Fig. 4 - Anterior surface of Heart - interior of right auricle exposed, Fig 5 - Interior of right Auricle, Ventrical, and Pulmonary Artery, Fig. 6 - Exterior of left Ventricle and of Aorta, Fig. 7 - Transverse section of Auricles, Aorta, and Pulmonary Artery, immediately above the origins of these vessels, showing the auriculo-ventricular and arterial valves in action, Fig. 8
Heart, illustration Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/heart-illustration-image69118463.htmlRME0CH8F–Heart, illustration
the image showing fossa ovalis, crista terminalis, musculi pectinati, heart valves and inter-arterial septum Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/the-image-showing-fossa-ovalis-crista-terminalis-musculi-pectinati-heart-valves-and-inter-arterial-septum-image567809628.htmlRF2RYNXY8–the image showing fossa ovalis, crista terminalis, musculi pectinati, heart valves and inter-arterial septum
HEART, SONOGRAPHY RESULT Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-heart-sonography-result-49310778.htmlRMCT68B6–HEART, SONOGRAPHY RESULT
. The development of the human body : a manual of human embryology. Embryology; Embryo, Non-Mammalian. 238 THE FORMATION OF THE HEART under surfaces of these flaps the loosely arranged muscular tra- becular of the ventricle are attached, and muscular tissue also occurs in the flaps. This condition is transitory, however; the muscular tissue of the flaps degenerates to form a dense layer of connective tissue, and at the same time the muscular trabecular undergo a condensation. Some of them separate from the flaps, which repre- sent the atrio-ventricular valves, and form muscle bundles which may Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/the-development-of-the-human-body-a-manual-of-human-embryology-embryology-embryo-non-mammalian-238-the-formation-of-the-heart-under-surfaces-of-these-flaps-the-loosely-arranged-muscular-tra-becular-of-the-ventricle-are-attached-and-muscular-tissue-also-occurs-in-the-flaps-this-condition-is-transitory-however-the-muscular-tissue-of-the-flaps-degenerates-to-form-a-dense-layer-of-connective-tissue-and-at-the-same-time-the-muscular-trabecular-undergo-a-condensation-some-of-them-separate-from-the-flaps-which-repre-sent-the-atrio-ventricular-valves-and-form-muscle-bundles-which-may-image215969538.htmlRMPFA79P–. The development of the human body : a manual of human embryology. Embryology; Embryo, Non-Mammalian. 238 THE FORMATION OF THE HEART under surfaces of these flaps the loosely arranged muscular tra- becular of the ventricle are attached, and muscular tissue also occurs in the flaps. This condition is transitory, however; the muscular tissue of the flaps degenerates to form a dense layer of connective tissue, and at the same time the muscular trabecular undergo a condensation. Some of them separate from the flaps, which repre- sent the atrio-ventricular valves, and form muscle bundles which may
Section through the heart of human embryo showing the formation of the cardiac septa and the auriculo-ventricular valves, 5 to 6 weeks. R.V, right auricle; L.V, left auricle; S.r.d, right horn of sinus; Sr.s, left horn of sinus; s. int, septum superior and endocardial cushion (septum intermedium); s. inf, septum infers ventriculorum; This septum, as well as the bulk of the ventricle, is a muscular sponge at this stage. Oc, esophagus; Br, bronchus. Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/section-through-the-heart-of-human-embryo-showing-the-formation-of-the-cardiac-septa-and-the-auriculo-ventricular-valves-5-to-6-weeks-rv-right-auricle-lv-left-auricle-srd-right-horn-of-sinus-srs-left-horn-of-sinus-s-int-septum-superior-and-endocardial-cushion-septum-intermedium-s-inf-septum-infers-ventriculorum-this-septum-as-well-as-the-bulk-of-the-ventricle-is-a-muscular-sponge-at-this-stage-oc-esophagus-br-bronchus-image246588101.htmlRMT951HW–Section through the heart of human embryo showing the formation of the cardiac septa and the auriculo-ventricular valves, 5 to 6 weeks. R.V, right auricle; L.V, left auricle; S.r.d, right horn of sinus; Sr.s, left horn of sinus; s. int, septum superior and endocardial cushion (septum intermedium); s. inf, septum infers ventriculorum; This septum, as well as the bulk of the ventricle, is a muscular sponge at this stage. Oc, esophagus; Br, bronchus.
A DeBakey Ventricular Assist Device (1966) on display in the National Museum of Health and Medicine, Silver Spring, MD, USA. Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-a-debakey-ventricular-assist-device-1966-on-display-in-the-national-173176515.htmlRMM1MTBF–A DeBakey Ventricular Assist Device (1966) on display in the National Museum of Health and Medicine, Silver Spring, MD, USA.
Heart, Cavities and Valves, Illustration, 1878 Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/heart-cavities-and-valves-illustration-1878-image352796940.htmlRM2BDY82M–Heart, Cavities and Valves, Illustration, 1878
illustration of human arterial and venous circulatory system Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/illustration-of-human-arterial-and-venous-circulatory-system-image602924849.htmlRF2X0WGP9–illustration of human arterial and venous circulatory system
Anatomy of the Heart Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/anatomy-of-the-heart-image353174692.htmlRM2BEGDWT–Anatomy of the Heart
medical illustration of how the human heart works Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/medical-illustration-of-how-the-human-heart-works-image602682561.htmlRF2X0EFN5–medical illustration of how the human heart works
Elements of comparative anatomy (1878) Elements of comparative anatomy elementsofcompar00gege Year: 1878 582 COMPARATIVE ANATOMY. as various arrangements. For example, there is a muscular process, which is able to partly shut off the cavity which gives off the branchial arteries from the rest of the ventricular cavity. The ventricle is com- pletely divided in the Crocodilini. The membranous valves of the ostium atrio-ventriculare are greatly developed in the right half of the heart. In the Crocodilini there is only one of these valves on the right side, and it extends along the septum of the Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/elements-of-comparative-anatomy-1878-elements-of-comparative-anatomy-elementsofcompar00gege-year-1878-582-comparative-anatomy-as-various-arrangements-for-example-there-is-a-muscular-process-which-is-able-to-partly-shut-off-the-cavity-which-gives-off-the-branchial-arteries-from-the-rest-of-the-ventricular-cavity-the-ventricle-is-com-pletely-divided-in-the-crocodilini-the-membranous-valves-of-the-ostium-atrio-ventriculare-are-greatly-developed-in-the-right-half-of-the-heart-in-the-crocodilini-there-is-only-one-of-these-valves-on-the-right-side-and-it-extends-along-the-septum-of-the-image239674508.htmlRMRWX37T–Elements of comparative anatomy (1878) Elements of comparative anatomy elementsofcompar00gege Year: 1878 582 COMPARATIVE ANATOMY. as various arrangements. For example, there is a muscular process, which is able to partly shut off the cavity which gives off the branchial arteries from the rest of the ventricular cavity. The ventricle is com- pletely divided in the Crocodilini. The membranous valves of the ostium atrio-ventriculare are greatly developed in the right half of the heart. In the Crocodilini there is only one of these valves on the right side, and it extends along the septum of the
. Elementary physiology . Fig. (>(>.—View of the base of the ventricular part of the heart, showing the relative position of the arterial and auriculo-ventricular orifices. (Allen Thomson.; The muscular fibres of the ventricles are exposed by the removal of the pericardium, fat, blood-vessels, etc ; the pulmonary artery and aorta and the auricles have been removed ; the valves are in the closed condition, i, i, right ventricle ; i', conus arteriosus ; 2, 2, left venticle ; 3, 3, the divided wall of the right auricle ; 4, that of the left ; 5, the inlundibular ; 5', the right, and 5&quo Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/elementary-physiology-fig-gtgtview-of-the-base-of-the-ventricular-part-of-the-heart-showing-the-relative-position-of-the-arterial-and-auriculo-ventricular-orifices-allen-thomson-the-muscular-fibres-of-the-ventricles-are-exposed-by-the-removal-of-the-pericardium-fat-blood-vessels-etc-the-pulmonary-artery-and-aorta-and-the-auricles-have-been-removed-the-valves-are-in-the-closed-condition-i-i-right-ventricle-i-conus-arteriosus-2-2-left-venticle-3-3-the-divided-wall-of-the-right-auricle-4-that-of-the-left-5-the-inlundibular-5-the-right-and-5quo-image178403523.htmlRMMA6YEB–. Elementary physiology . Fig. (>(>.—View of the base of the ventricular part of the heart, showing the relative position of the arterial and auriculo-ventricular orifices. (Allen Thomson.; The muscular fibres of the ventricles are exposed by the removal of the pericardium, fat, blood-vessels, etc ; the pulmonary artery and aorta and the auricles have been removed ; the valves are in the closed condition, i, i, right ventricle ; i', conus arteriosus ; 2, 2, left venticle ; 3, 3, the divided wall of the right auricle ; 4, that of the left ; 5, the inlundibular ; 5', the right, and 5&quo
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A manual of human physiology, including histology and microscopical anatomy, with special reference to the requirements of practical medicine . cles(Williams, 1835). This sound is supported and increased by the sound produced by thetension and vibration of the auriculo-ventricular valves and theirchordre tendiniae, at the moment of the ventricular systole (Rouanet,Kiwisch, Bayer, Giese). Wintrich, by means of proper resonators, has been able so to analysethe first sound as to distinguish the clear, short, valvular part from thedeep, long, muscular sound. The muscle-sound produced by transverse Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/a-manual-of-human-physiology-including-histology-and-microscopical-anatomy-with-special-reference-to-the-requirements-of-practical-medicine-cleswilliams-1835-this-sound-is-supported-and-increased-by-the-sound-produced-by-thetension-and-vibration-of-the-auriculo-ventricular-valves-and-theirchordre-tendiniae-at-the-moment-of-the-ventricular-systole-rouanetkiwisch-bayer-giese-wintrich-by-means-of-proper-resonators-has-been-able-so-to-analysethe-first-sound-as-to-distinguish-the-clear-short-valvular-part-from-thedeep-long-muscular-sound-the-muscle-sound-produced-by-transverse-image340070547.htmlRM2AN7FCK–A manual of human physiology, including histology and microscopical anatomy, with special reference to the requirements of practical medicine . cles(Williams, 1835). This sound is supported and increased by the sound produced by thetension and vibration of the auriculo-ventricular valves and theirchordre tendiniae, at the moment of the ventricular systole (Rouanet,Kiwisch, Bayer, Giese). Wintrich, by means of proper resonators, has been able so to analysethe first sound as to distinguish the clear, short, valvular part from thedeep, long, muscular sound. The muscle-sound produced by transverse
HEART, SONOGRAPHY RESULT Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-heart-sonography-result-49310781.htmlRMCT68B9–HEART, SONOGRAPHY RESULT
. Elements of the comparative anatomy of vertebrates. Anatomy, Comparative. A Fig. 249.—Diagram showin-; pulmonary veins ;. V, i; pre- and po.st-cavals (only one precaval is indicated). trated (Fig. 250). There are always two fibrous, pooket-likc atrio- ventricular valves, which are connected with the walls of the ventricle by cords. The two pulmonary veins unite before opening into the left atrium.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly rese Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/elements-of-the-comparative-anatomy-of-vertebrates-anatomy-comparative-a-fig-249diagram-showin-pulmonary-veins-v-i-pre-and-post-cavals-only-one-precaval-is-indicated-trated-fig-250-there-are-always-two-fibrous-pooket-likc-atrio-ventricular-valves-which-are-connected-with-the-walls-of-the-ventricle-by-cords-the-two-pulmonary-veins-unite-before-opening-into-the-left-atrium-please-note-that-these-images-are-extracted-from-scanned-page-images-that-may-have-been-digitally-enhanced-for-readability-coloration-and-appearance-of-these-illustrations-may-not-perfectly-rese-image216418708.htmlRMPG2M7G–. Elements of the comparative anatomy of vertebrates. Anatomy, Comparative. A Fig. 249.—Diagram showin-; pulmonary veins ;. V, i; pre- and po.st-cavals (only one precaval is indicated). trated (Fig. 250). There are always two fibrous, pooket-likc atrio- ventricular valves, which are connected with the walls of the ventricle by cords. The two pulmonary veins unite before opening into the left atrium.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly rese
Anatomy of the Heart Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/anatomy-of-the-heart-image353174695.htmlRM2BEGDWY–Anatomy of the Heart
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. Elementary physiology . Fig. 6i.—Schematic diagram to illustrate the course of the circulation. I, right auricle; 2, left auricle; 3, right ventricle; 4, left ventricle; 5, vena cava superior ; 6, vena cava inferior ; 7, pulmonary' arteries ; 8, lungs ; g, pulmonary veins; 10, aorta; 11, vessels of alimentarj' canal; 12, vessels of liver; 13, hepatic arterj-; 14, portal vein ; 15, hepatic vein. ^ The auriculo-ventricular valve on the left side is called the viitral valve, that on the right the tircnspid valve. The valves placed on the aorta and pulmonary arteries, as they respectively issue Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/elementary-physiology-fig-6ischematic-diagram-to-illustrate-the-course-of-the-circulation-i-right-auricle-2-left-auricle-3-right-ventricle-4-left-ventricle-5-vena-cava-superior-6-vena-cava-inferior-7-pulmonary-arteries-8-lungs-g-pulmonary-veins-10-aorta-11-vessels-of-alimentarj-canal-12-vessels-of-liver-13-hepatic-arterj-14-portal-vein-15-hepatic-vein-the-auriculo-ventricular-valve-on-the-left-side-is-called-the-viitral-valve-that-on-the-right-the-tircnspid-valve-the-valves-placed-on-the-aorta-and-pulmonary-arteries-as-they-respectively-issue-image178403526.htmlRMMA6YEE–. Elementary physiology . Fig. 6i.—Schematic diagram to illustrate the course of the circulation. I, right auricle; 2, left auricle; 3, right ventricle; 4, left ventricle; 5, vena cava superior ; 6, vena cava inferior ; 7, pulmonary' arteries ; 8, lungs ; g, pulmonary veins; 10, aorta; 11, vessels of alimentarj' canal; 12, vessels of liver; 13, hepatic arterj-; 14, portal vein ; 15, hepatic vein. ^ The auriculo-ventricular valve on the left side is called the viitral valve, that on the right the tircnspid valve. The valves placed on the aorta and pulmonary arteries, as they respectively issue
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Medical and surgical reports . .. In the jugular tracing the carotid wave (c) precedes the auricular wave (a) by amore or less regular interval. As the ventricle is in systole during the beat of theauricle and the auriculo-ventricular valves are closed, the (a) wave is abnormally high. By reversed rhythm is meant a state in which the beat of the auriclefollows that of the ventricle instead of, as in the normal condition,preceding it. Cushny was its discoverer in dogs hearts, and he hasadvanced the theory that it is dependent upon an excessive irritabilityof the ventricular muscle with probably Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/medical-and-surgical-reports-in-the-jugular-tracing-the-carotid-wave-c-precedes-the-auricular-wave-a-by-amore-or-less-regular-interval-as-the-ventricle-is-in-systole-during-the-beat-of-theauricle-and-the-auriculo-ventricular-valves-are-closed-the-a-wave-is-abnormally-high-by-reversed-rhythm-is-meant-a-state-in-which-the-beat-of-the-auriclefollows-that-of-the-ventricle-instead-of-as-in-the-normal-conditionpreceding-it-cushny-was-its-discoverer-in-dogs-hearts-and-he-hasadvanced-the-theory-that-it-is-dependent-upon-an-excessive-irritabilityof-the-ventricular-muscle-with-probably-image338395639.htmlRM2AJF72F–Medical and surgical reports . .. In the jugular tracing the carotid wave (c) precedes the auricular wave (a) by amore or less regular interval. As the ventricle is in systole during the beat of theauricle and the auriculo-ventricular valves are closed, the (a) wave is abnormally high. By reversed rhythm is meant a state in which the beat of the auriclefollows that of the ventricle instead of, as in the normal condition,preceding it. Cushny was its discoverer in dogs hearts, and he hasadvanced the theory that it is dependent upon an excessive irritabilityof the ventricular muscle with probably
vector illustration of heart and pacemaker. cardiology Stock Vectorhttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/vector-illustration-of-heart-and-pacemaker-cardiology-image241584055.htmlRFT112WY–vector illustration of heart and pacemaker. cardiology
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. The development of the human body : a manual of human embryology. Embryology; Embryo, Non-Mammalian. Fig. 144.—Diagrams showing the Development of the Atjriculo-ventricular Valves. b, Muscular trabecule; cht, chordae tendinae; mk and vtk1, valve; pm, musculus papillaris; tc, trabeculse carneae; v, ventricle.—(From Hertwig, after Gegenbaur.) may retain a transverse direction, passing across the ventricular cavity and forming the so-called moderator bands; while others, again, retaining their attachment to the valves, condense only at their lower ends to form the musculi papillares, their uppe Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/the-development-of-the-human-body-a-manual-of-human-embryology-embryology-embryo-non-mammalian-fig-144diagrams-showing-the-development-of-the-atjriculo-ventricular-valves-b-muscular-trabecule-cht-chordae-tendinae-mk-and-vtk1-valve-pm-musculus-papillaris-tc-trabeculse-carneae-v-ventriclefrom-hertwig-after-gegenbaur-may-retain-a-transverse-direction-passing-across-the-ventricular-cavity-and-forming-the-so-called-moderator-bands-while-others-again-retaining-their-attachment-to-the-valves-condense-only-at-their-lower-ends-to-form-the-musculi-papillares-their-uppe-image215969534.htmlRMPFA79J–. The development of the human body : a manual of human embryology. Embryology; Embryo, Non-Mammalian. Fig. 144.—Diagrams showing the Development of the Atjriculo-ventricular Valves. b, Muscular trabecule; cht, chordae tendinae; mk and vtk1, valve; pm, musculus papillaris; tc, trabeculse carneae; v, ventricle.—(From Hertwig, after Gegenbaur.) may retain a transverse direction, passing across the ventricular cavity and forming the so-called moderator bands; while others, again, retaining their attachment to the valves, condense only at their lower ends to form the musculi papillares, their uppe
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. Medical diagnosis for the student and practitioner. onstant supply of bright, red. arterial blood that has undergoneventilation and purification in the pulmonary air cells. During the recurring periods of ventricular relaxation (diastole) whichfollow each ventricular contraction, the blood passes from the auricles intothe ventricles through the opened auriculo-ventricular valves; the mitral onthe left, the tricuspid on the right. THE EXAMINATION OF THE HEART 457 Systole.—With the initiation oi systole ipresphygmic period) thesevalves abruptly close (first sound) the inlets to prevent backrlo Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/medical-diagnosis-for-the-student-and-practitioner-onstant-supply-of-bright-red-arterial-blood-that-has-undergoneventilation-and-purification-in-the-pulmonary-air-cells-during-the-recurring-periods-of-ventricular-relaxation-diastole-whichfollow-each-ventricular-contraction-the-blood-passes-from-the-auricles-intothe-ventricles-through-the-opened-auriculo-ventricular-valves-the-mitral-onthe-left-the-tricuspid-on-the-right-the-examination-of-the-heart-457-systolewith-the-initiation-oi-systole-ipresphygmic-period-thesevalves-abruptly-close-first-sound-the-inlets-to-prevent-backrlo-image336881270.htmlRM2AG27DX–. Medical diagnosis for the student and practitioner. onstant supply of bright, red. arterial blood that has undergoneventilation and purification in the pulmonary air cells. During the recurring periods of ventricular relaxation (diastole) whichfollow each ventricular contraction, the blood passes from the auricles intothe ventricles through the opened auriculo-ventricular valves; the mitral onthe left, the tricuspid on the right. THE EXAMINATION OF THE HEART 457 Systole.—With the initiation oi systole ipresphygmic period) thesevalves abruptly close (first sound) the inlets to prevent backrlo
. A manual of zoology. 420 MANUAL OF ZOOLOGY trunk (pal- in- tr). The carotid and systemic trunks com- municate separately with the bulbus, the two pulmo-cuta- neous trunks communicate with the anterior end of the conus by a single aperture placed just below the free end of the longitudinal valve. car.cfl sysl.t. CUlr.V.V Fig. 252. — Rana temporaria. The heart from the ventral aspect with the cavities laid open, a, a', bristle in left carotid trunk: an. i>. z', atiriculo-ventricular valves: />,/>', bristle in left systemic trunk; c,c', bristle in left pulmo-cutaneous trunk; car. a, ca Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/a-manual-of-zoology-420-manual-of-zoology-trunk-pal-in-tr-the-carotid-and-systemic-trunks-com-municate-separately-with-the-bulbus-the-two-pulmo-cuta-neous-trunks-communicate-with-the-anterior-end-of-the-conus-by-a-single-aperture-placed-just-below-the-free-end-of-the-longitudinal-valve-carcfl-syslt-culrvv-fig-252-rana-temporaria-the-heart-from-the-ventral-aspect-with-the-cavities-laid-open-a-a-bristle-in-left-carotid-trunk-an-igt-z-atiriculo-ventricular-valves-gtgt-bristle-in-left-systemic-trunk-cc-bristle-in-left-pulmo-cutaneous-trunk-car-a-ca-image216446421.htmlRMPG3YH9–. A manual of zoology. 420 MANUAL OF ZOOLOGY trunk (pal- in- tr). The carotid and systemic trunks com- municate separately with the bulbus, the two pulmo-cuta- neous trunks communicate with the anterior end of the conus by a single aperture placed just below the free end of the longitudinal valve. car.cfl sysl.t. CUlr.V.V Fig. 252. — Rana temporaria. The heart from the ventral aspect with the cavities laid open, a, a', bristle in left carotid trunk: an. i>. z', atiriculo-ventricular valves: />,/>', bristle in left systemic trunk; c,c', bristle in left pulmo-cutaneous trunk; car. a, ca
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. Medical diagnosis for the student and practitioner. wave which is the auricular waveof the anticipated systole acting against auriculo-ventricular valves closedby the extrasystolic contraction. This when present sweeps from thejugular fossa over the sterno-mastoid muscle. Exception.—In bradycardia (slow pulse) if the premature contractionis very early the compensatory pause may be absent because the regularbeat escapes full elision and takes its proper place in the cycle, time enoughhaving elapsed between the ventricular extrasystole and the period of normal CARDIAC ARRHYTHMIAS 547 auricular Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/medical-diagnosis-for-the-student-and-practitioner-wave-which-is-the-auricular-waveof-the-anticipated-systole-acting-against-auriculo-ventricular-valves-closedby-the-extrasystolic-contraction-this-when-present-sweeps-from-thejugular-fossa-over-the-sterno-mastoid-muscle-exceptionin-bradycardia-slow-pulse-if-the-premature-contractionis-very-early-the-compensatory-pause-may-be-absent-because-the-regularbeat-escapes-full-elision-and-takes-its-proper-place-in-the-cycle-time-enoughhaving-elapsed-between-the-ventricular-extrasystole-and-the-period-of-normal-cardiac-arrhythmias-547-auricular-image336863520.htmlRM2AG1CT0–. Medical diagnosis for the student and practitioner. wave which is the auricular waveof the anticipated systole acting against auriculo-ventricular valves closedby the extrasystolic contraction. This when present sweeps from thejugular fossa over the sterno-mastoid muscle. Exception.—In bradycardia (slow pulse) if the premature contractionis very early the compensatory pause may be absent because the regularbeat escapes full elision and takes its proper place in the cycle, time enoughhaving elapsed between the ventricular extrasystole and the period of normal CARDIAC ARRHYTHMIAS 547 auricular
. Zoology : for students and general readers . Zoology. ANATOMY OF THE GUNNER. 439 The walls of the auricle are comparatively thin ; the auriculo- ventricular orifice is provided with valves, which prevent the blood flowing back into the auricle. The walls of the ventricle are thick and very muscular ; from the upper end of the ventricle close to the base of the auricle springs the iidbus arteriosus, a muscular cylinder, which, running hori- zontally forward, passes out through the pericardium, and is continued as the less muscular aorta (A) underneath the branchial arches along the median lin Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/zoology-for-students-and-general-readers-zoology-anatomy-of-the-gunner-439-the-walls-of-the-auricle-are-comparatively-thin-the-auriculo-ventricular-orifice-is-provided-with-valves-which-prevent-the-blood-flowing-back-into-the-auricle-the-walls-of-the-ventricle-are-thick-and-very-muscular-from-the-upper-end-of-the-ventricle-close-to-the-base-of-the-auricle-springs-the-iidbus-arteriosus-a-muscular-cylinder-which-running-hori-zontally-forward-passes-out-through-the-pericardium-and-is-continued-as-the-less-muscular-aorta-a-underneath-the-branchial-arches-along-the-median-lin-image216373593.htmlRMPG0JM9–. Zoology : for students and general readers . Zoology. ANATOMY OF THE GUNNER. 439 The walls of the auricle are comparatively thin ; the auriculo- ventricular orifice is provided with valves, which prevent the blood flowing back into the auricle. The walls of the ventricle are thick and very muscular ; from the upper end of the ventricle close to the base of the auricle springs the iidbus arteriosus, a muscular cylinder, which, running hori- zontally forward, passes out through the pericardium, and is continued as the less muscular aorta (A) underneath the branchial arches along the median lin
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Illustration of the heart showing hypertrophy in the left ventricle. Left ventricle hypertrophy (LHV) can develop in response to factors such as high blood pressure which require the left ventricle to work harder. As the workload increases, the walls of t Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-illustration-of-the-heart-showing-hypertrophy-in-the-left-ventricle-103992321.htmlRMG1577D–Illustration of the heart showing hypertrophy in the left ventricle. Left ventricle hypertrophy (LHV) can develop in response to factors such as high blood pressure which require the left ventricle to work harder. As the workload increases, the walls of t
. Diseases of the heart and thoracic aorta. when thearterial blood-pressure is low ; the line of ascent {a to d^corresponds to the contraction and rounding of the ven-tricles ; the apex {d) to the bursting open of the aorticvalves ; the wave {b) probably represents the closure of theauriculo-ventricular valves ; the wave {e) possibly representsthe resistance which the left ventricle meets with in propellingits blood, after the aortic valves have been opened, into thearterial system ; the wave (/) is probably due to the move-ment of the heart as a whole, and probably represents thedistention of Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/diseases-of-the-heart-and-thoracic-aorta-when-thearterial-blood-pressure-is-low-the-line-of-ascent-a-to-dcorresponds-to-the-contraction-and-rounding-of-the-ven-tricles-the-apex-d-to-the-bursting-open-of-the-aorticvalves-the-wave-b-probably-represents-the-closure-of-theauriculo-ventricular-valves-the-wave-e-possibly-representsthe-resistance-which-the-left-ventricle-meets-with-in-propellingits-blood-after-the-aortic-valves-have-been-opened-into-thearterial-system-the-wave-is-probably-due-to-the-move-ment-of-the-heart-as-a-whole-and-probably-represents-thedistention-of-image336694913.htmlRM2AFNNP9–. Diseases of the heart and thoracic aorta. when thearterial blood-pressure is low ; the line of ascent {a to d^corresponds to the contraction and rounding of the ven-tricles ; the apex {d) to the bursting open of the aorticvalves ; the wave {b) probably represents the closure of theauriculo-ventricular valves ; the wave {e) possibly representsthe resistance which the left ventricle meets with in propellingits blood, after the aortic valves have been opened, into thearterial system ; the wave (/) is probably due to the move-ment of the heart as a whole, and probably represents thedistention of
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. CIRCULATION. 649 Fig. 320.. Cuttle-fah. the gills has a dilated contractile portion (£>*), which dilatations may be considered as bran- chial hearts, so that there are three separate contractile portions of the circulatory system. In the Gasteropoda and Pteropoda, there is only one heart. This organ is strong and mus- cular, provided with valves, and consisting of an auricular and a ventricular cavity (Jigs. 321 and 322, h, H). In the Testaceous Acephala, the heart is nearly of the same structure as in the orders just Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/the-cyclopdia-of-anatomy-and-physiology-anatomy-physiology-zoology-circulation-649-fig-320-cuttle-fah-the-gills-has-a-dilated-contractile-portion-gt-which-dilatations-may-be-considered-as-bran-chial-hearts-so-that-there-are-three-separate-contractile-portions-of-the-circulatory-system-in-the-gasteropoda-and-pteropoda-there-is-only-one-heart-this-organ-is-strong-and-mus-cular-provided-with-valves-and-consisting-of-an-auricular-and-a-ventricular-cavity-jigs-321-and-322-h-h-in-the-testaceous-acephala-the-heart-is-nearly-of-the-same-structure-as-in-the-orders-just-image216210643.htmlRMPFN6TK–. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. CIRCULATION. 649 Fig. 320.. Cuttle-fah. the gills has a dilated contractile portion (£>*), which dilatations may be considered as bran- chial hearts, so that there are three separate contractile portions of the circulatory system. In the Gasteropoda and Pteropoda, there is only one heart. This organ is strong and mus- cular, provided with valves, and consisting of an auricular and a ventricular cavity (Jigs. 321 and 322, h, H). In the Testaceous Acephala, the heart is nearly of the same structure as in the orders just
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Illustration of the heart showing hypertrophy in the left ventricle. Left ventricle hypertrophy (LHV) can develop in response to factors such as high blood pressure which require the left ventricle to work harder. As the workload increases, the walls of t Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-illustration-of-the-heart-showing-hypertrophy-in-the-left-ventricle-103992320.htmlRMG1577C–Illustration of the heart showing hypertrophy in the left ventricle. Left ventricle hypertrophy (LHV) can develop in response to factors such as high blood pressure which require the left ventricle to work harder. As the workload increases, the walls of t
Diseases of the chest and the principles of physical diagnosis . this time and is due to the downward rebound of the auriculo-ventricular tissues to their normal position. The second negative depression y is due to the opening of theauriculo-ventricular valves. CHAPTER XV CARDIAC ARRHYTHMIA Recent additions to our knowledge of cardiac anatomy and physi-ology have thrown much valuable light upon our conception of heartdisease, and have placed cardiac diagnosis and therapy upon a muchmore accurate scientific basis. As a result of these advances the studyof cardiac irregularities has been greatly Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/diseases-of-the-chest-and-the-principles-of-physical-diagnosis-this-time-and-is-due-to-the-downward-rebound-of-the-auriculo-ventricular-tissues-to-their-normal-position-the-second-negative-depression-y-is-due-to-the-opening-of-theauriculo-ventricular-valves-chapter-xv-cardiac-arrhythmia-recent-additions-to-our-knowledge-of-cardiac-anatomy-and-physi-ology-have-thrown-much-valuable-light-upon-our-conception-of-heartdisease-and-have-placed-cardiac-diagnosis-and-therapy-upon-a-muchmore-accurate-scientific-basis-as-a-result-of-these-advances-the-studyof-cardiac-irregularities-has-been-greatly-image340293853.htmlRM2ANHM7W–Diseases of the chest and the principles of physical diagnosis . this time and is due to the downward rebound of the auriculo-ventricular tissues to their normal position. The second negative depression y is due to the opening of theauriculo-ventricular valves. CHAPTER XV CARDIAC ARRHYTHMIA Recent additions to our knowledge of cardiac anatomy and physi-ology have thrown much valuable light upon our conception of heartdisease, and have placed cardiac diagnosis and therapy upon a muchmore accurate scientific basis. As a result of these advances the studyof cardiac irregularities has been greatly
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. Cuttle-fah. the gills has a dilated contractile portion (£>*), which dilatations may be considered as bran- chial hearts, so that there are three separate contractile portions of the circulatory system. In the Gasteropoda and Pteropoda, there is only one heart. This organ is strong and mus- cular, provided with valves, and consisting of an auricular and a ventricular cavity (Jigs. 321 and 322, h, H). In the Testaceous Acephala, the heart is nearly of the same structure as in the orders just mentioned, but less fully d Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/the-cyclopdia-of-anatomy-and-physiology-anatomy-physiology-zoology-cuttle-fah-the-gills-has-a-dilated-contractile-portion-gt-which-dilatations-may-be-considered-as-bran-chial-hearts-so-that-there-are-three-separate-contractile-portions-of-the-circulatory-system-in-the-gasteropoda-and-pteropoda-there-is-only-one-heart-this-organ-is-strong-and-mus-cular-provided-with-valves-and-consisting-of-an-auricular-and-a-ventricular-cavity-jigs-321-and-322-h-h-in-the-testaceous-acephala-the-heart-is-nearly-of-the-same-structure-as-in-the-orders-just-mentioned-but-less-fully-d-image216210635.htmlRMPFN6TB–. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. Cuttle-fah. the gills has a dilated contractile portion (£>*), which dilatations may be considered as bran- chial hearts, so that there are three separate contractile portions of the circulatory system. In the Gasteropoda and Pteropoda, there is only one heart. This organ is strong and mus- cular, provided with valves, and consisting of an auricular and a ventricular cavity (Jigs. 321 and 322, h, H). In the Testaceous Acephala, the heart is nearly of the same structure as in the orders just mentioned, but less fully d
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Illustration showing a normal heart at left and a heart with left ventricle hypertrophy at right. Left ventricle hypertrophy (LHV) can develop in response to factors such as high blood pressure which require the left ventricle to work harder. As the workl Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-illustration-showing-a-normal-heart-at-left-and-a-heart-with-left-103992323.htmlRMG1577F–Illustration showing a normal heart at left and a heart with left ventricle hypertrophy at right. Left ventricle hypertrophy (LHV) can develop in response to factors such as high blood pressure which require the left ventricle to work harder. As the workl
A manual of human physiology, including histology and microscopical anatomy, with special reference to the requirements of practical medicine . omenarrowed (Haller, Nysten) owing to the contraction of their circularmuscular fibres (more especially the superior vena cava and thepulmonary veins). (2.) The auricular walls contract simultaneously towards the auriculo-ventricular valves and the venous orifices, whereby EVENTS DURING A CARDIAC CYCLE. 77 (3.) The blood is driven into the relaxed ventricles, which are con-siderably distended thereby. The contraction of the auricles is followed by (a.) Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/a-manual-of-human-physiology-including-histology-and-microscopical-anatomy-with-special-reference-to-the-requirements-of-practical-medicine-omenarrowed-haller-nysten-owing-to-the-contraction-of-their-circularmuscular-fibres-more-especially-the-superior-vena-cava-and-thepulmonary-veins-2-the-auricular-walls-contract-simultaneously-towards-the-auriculo-ventricular-valves-and-the-venous-orifices-whereby-events-during-a-cardiac-cycle-77-3-the-blood-is-driven-into-the-relaxed-ventricles-which-are-con-siderably-distended-thereby-the-contraction-of-the-auricles-is-followed-by-a-image340077798.htmlRM2AN7TKJ–A manual of human physiology, including histology and microscopical anatomy, with special reference to the requirements of practical medicine . omenarrowed (Haller, Nysten) owing to the contraction of their circularmuscular fibres (more especially the superior vena cava and thepulmonary veins). (2.) The auricular walls contract simultaneously towards the auriculo-ventricular valves and the venous orifices, whereby EVENTS DURING A CARDIAC CYCLE. 77 (3.) The blood is driven into the relaxed ventricles, which are con-siderably distended thereby. The contraction of the auricles is followed by (a.)
. Elements of the comparative anatomy of vertebrates. Anatomy, Comparative. VASCULAR SYSTEM 317 valve) to which are attached tendinous cords.i arising from the papillary muscles. In Birds the left atrio-ventricular aperture is provided with a valve consisting of three membranous folds : in Mammals there are only two folds, and the valve is therefore knowu as the Ucuspid or mitral; three semilunar pocket-like valves are also present at the origins of the pulmonary artery and aorta in both Birds and Mammals. As regards the origin of the great vessels. Birds are distinguished from Mammals by the Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/elements-of-the-comparative-anatomy-of-vertebrates-anatomy-comparative-vascular-system-317-valve-to-which-are-attached-tendinous-cordsi-arising-from-the-papillary-muscles-in-birds-the-left-atrio-ventricular-aperture-is-provided-with-a-valve-consisting-of-three-membranous-folds-in-mammals-there-are-only-two-folds-and-the-valve-is-therefore-knowu-as-the-ucuspid-or-mitral-three-semilunar-pocket-like-valves-are-also-present-at-the-origins-of-the-pulmonary-artery-and-aorta-in-both-birds-and-mammals-as-regards-the-origin-of-the-great-vessels-birds-are-distinguished-from-mammals-by-the-image216418687.htmlRMPG2M6R–. Elements of the comparative anatomy of vertebrates. Anatomy, Comparative. VASCULAR SYSTEM 317 valve) to which are attached tendinous cords.i arising from the papillary muscles. In Birds the left atrio-ventricular aperture is provided with a valve consisting of three membranous folds : in Mammals there are only two folds, and the valve is therefore knowu as the Ucuspid or mitral; three semilunar pocket-like valves are also present at the origins of the pulmonary artery and aorta in both Birds and Mammals. As regards the origin of the great vessels. Birds are distinguished from Mammals by the
BLOOD CIRCULATION, ILLUSTRATION Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-blood-circulation-illustration-49280060.htmlRMCT4W64–BLOOD CIRCULATION, ILLUSTRATION
Illustration showing a normal heart at left and a heart with left ventricle hypertrophy at right. Left ventricle hypertrophy (LHV) can develop in response to factors such as high blood pressure which require the left ventricle to work harder. As the workl Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-illustration-showing-a-normal-heart-at-left-and-a-heart-with-left-103992322.htmlRMG1577E–Illustration showing a normal heart at left and a heart with left ventricle hypertrophy at right. Left ventricle hypertrophy (LHV) can develop in response to factors such as high blood pressure which require the left ventricle to work harder. As the workl
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A text-book of physiology, for medical students and physicians . f water a sound similar to that of the second heart soundis heard. The physician uses this view of the cause of the second sound inauscultation, and it is evident that the nature of the sound or itsreplacement by murmurs will give useful testimony regarding thecondition of the semilunar valves. The first heart sound has of-fered more difficulty. It occurs at or shortly before the closure of theauriculo-ventricular valves, and it would seem natural, therefore, toattribute it to the vibration of these valves when suddenly put under Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/a-text-book-of-physiology-for-medical-students-and-physicians-f-water-a-sound-similar-to-that-of-the-second-heart-soundis-heard-the-physician-uses-this-view-of-the-cause-of-the-second-sound-inauscultation-and-it-is-evident-that-the-nature-of-the-sound-or-itsreplacement-by-murmurs-will-give-useful-testimony-regarding-thecondition-of-the-semilunar-valves-the-first-heart-sound-has-of-fered-more-difficulty-it-occurs-at-or-shortly-before-the-closure-of-theauriculo-ventricular-valves-and-it-would-seem-natural-therefore-toattribute-it-to-the-vibration-of-these-valves-when-suddenly-put-under-image342928194.htmlRM2AWWMBE–A text-book of physiology, for medical students and physicians . f water a sound similar to that of the second heart soundis heard. The physician uses this view of the cause of the second sound inauscultation, and it is evident that the nature of the sound or itsreplacement by murmurs will give useful testimony regarding thecondition of the semilunar valves. The first heart sound has of-fered more difficulty. It occurs at or shortly before the closure of theauriculo-ventricular valves, and it would seem natural, therefore, toattribute it to the vibration of these valves when suddenly put under
. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. HEART OF REPTILES. 511 not only by the ordinary valve on its left side, which is attached to the base of the auricular septum, but by a similar though smaller fold on the opposite or right side: this fold becomes the fleshy auriculo-ventricular valve in birds. To the junction of the two valves at their lower angle a fleshy column is attached. The ventricular cavity, ib. E, which receives the venous blood, propels it to the left aorta. A, and to the pulmonary artery, P: tlie origin of each is guarded by a pair of semiluna Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/on-the-anatomy-of-vertebrates-vertebrates-anatomy-comparative-1866-heart-of-reptiles-511-not-only-by-the-ordinary-valve-on-its-left-side-which-is-attached-to-the-base-of-the-auricular-septum-but-by-a-similar-though-smaller-fold-on-the-opposite-or-right-side-this-fold-becomes-the-fleshy-auriculo-ventricular-valve-in-birds-to-the-junction-of-the-two-valves-at-their-lower-angle-a-fleshy-column-is-attached-the-ventricular-cavity-ib-e-which-receives-the-venous-blood-propels-it-to-the-left-aorta-a-and-to-the-pulmonary-artery-p-tlie-origin-of-each-is-guarded-by-a-pair-of-semiluna-image216416714.htmlRMPG2HMA–. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. HEART OF REPTILES. 511 not only by the ordinary valve on its left side, which is attached to the base of the auricular septum, but by a similar though smaller fold on the opposite or right side: this fold becomes the fleshy auriculo-ventricular valve in birds. To the junction of the two valves at their lower angle a fleshy column is attached. The ventricular cavity, ib. E, which receives the venous blood, propels it to the left aorta. A, and to the pulmonary artery, P: tlie origin of each is guarded by a pair of semiluna
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A manual of human physiology, including histology and microscopical anatomy, with special reference to the requirements of practical medicine . surface of theauriculo-ventricular valves, whose curved margins are opposed to eachother like teeth, and are pressed hermetically against each other (Sand-borg and Worm Miiller). It is impossible for the blood to push thecusps backwards into the auricle, as the chordce tendinice hold fast theirmargins and surfaces like a taut sail. The margins of the neighbouring cusps are also kept in apposition by thechordre tendinise from one papillary musclealways Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/a-manual-of-human-physiology-including-histology-and-microscopical-anatomy-with-special-reference-to-the-requirements-of-practical-medicine-surface-of-theauriculo-ventricular-valves-whose-curved-margins-are-opposed-to-eachother-like-teeth-and-are-pressed-hermetically-against-each-other-sand-borg-and-worm-miiller-it-is-impossible-for-the-blood-to-push-thecusps-backwards-into-the-auricle-as-the-chordce-tendinice-hold-fast-theirmargins-and-surfaces-like-a-taut-sail-the-margins-of-the-neighbouring-cusps-are-also-kept-in-apposition-by-thechordre-tendinise-from-one-papillary-musclealways-image340077696.htmlRM2AN7TG0–A manual of human physiology, including histology and microscopical anatomy, with special reference to the requirements of practical medicine . surface of theauriculo-ventricular valves, whose curved margins are opposed to eachother like teeth, and are pressed hermetically against each other (Sand-borg and Worm Miiller). It is impossible for the blood to push thecusps backwards into the auricle, as the chordce tendinice hold fast theirmargins and surfaces like a taut sail. The margins of the neighbouring cusps are also kept in apposition by thechordre tendinise from one papillary musclealways
. Agricultural zoology. Zoology. 18 ZOOLOGY. between auricle and ventricle, one valve is not enough to make it impossible for the blood to pass back into the auricle during the contraction of the ventricular walls. There are two or three valves there (Fig. 8, KL), fixed by fibres to the wall of the ventricle. In order that the blood which is forced into the artery {8.A.) may not pass into the ventricle during its relaxa- tion, there is another valve (not indicated in Fig. 8), at the base of the artery. An arrangement like that so far described is found in fishes. The heart consists in them of Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/agricultural-zoology-zoology-18-zoology-between-auricle-and-ventricle-one-valve-is-not-enough-to-make-it-impossible-for-the-blood-to-pass-back-into-the-auricle-during-the-contraction-of-the-ventricular-walls-there-are-two-or-three-valves-there-fig-8-kl-fixed-by-fibres-to-the-wall-of-the-ventricle-in-order-that-the-blood-which-is-forced-into-the-artery-8a-may-not-pass-into-the-ventricle-during-its-relaxa-tion-there-is-another-valve-not-indicated-in-fig-8-at-the-base-of-the-artery-an-arrangement-like-that-so-far-described-is-found-in-fishes-the-heart-consists-in-them-of-image216375453.htmlRMPG0N2N–. Agricultural zoology. Zoology. 18 ZOOLOGY. between auricle and ventricle, one valve is not enough to make it impossible for the blood to pass back into the auricle during the contraction of the ventricular walls. There are two or three valves there (Fig. 8, KL), fixed by fibres to the wall of the ventricle. In order that the blood which is forced into the artery {8.A.) may not pass into the ventricle during its relaxa- tion, there is another valve (not indicated in Fig. 8), at the base of the artery. An arrangement like that so far described is found in fishes. The heart consists in them of
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Studies in cardiac pathology . cardium being greater in thestanding position, a greater pressure is exerted not only on the heart itself, butalso upon the venae cavae, both of which would tend to lessen the blood-contentof the heart, as would also lowering of blood-pressure and increase of pulse-rate. Dilatation sometimes results from pure fatigue of the muscle,no structural changes being demonstrable. Dilatation by bulgingof the ventricle drags on the papillary muscles and makes it moredifficult for the auriculo-ventricular valves to close, thus producingvalvular incompetency^ Although the co Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/studies-in-cardiac-pathology-cardium-being-greater-in-thestanding-position-a-greater-pressure-is-exerted-not-only-on-the-heart-itself-butalso-upon-the-venae-cavae-both-of-which-would-tend-to-lessen-the-blood-contentof-the-heart-as-would-also-lowering-of-blood-pressure-and-increase-of-pulse-rate-dilatation-sometimes-results-from-pure-fatigue-of-the-muscleno-structural-changes-being-demonstrable-dilatation-by-bulgingof-the-ventricle-drags-on-the-papillary-muscles-and-makes-it-moredifficult-for-the-auriculo-ventricular-valves-to-close-thus-producingvalvular-incompetency-although-the-co-image340158615.htmlRM2ANBFNY–Studies in cardiac pathology . cardium being greater in thestanding position, a greater pressure is exerted not only on the heart itself, butalso upon the venae cavae, both of which would tend to lessen the blood-contentof the heart, as would also lowering of blood-pressure and increase of pulse-rate. Dilatation sometimes results from pure fatigue of the muscle,no structural changes being demonstrable. Dilatation by bulgingof the ventricle drags on the papillary muscles and makes it moredifficult for the auriculo-ventricular valves to close, thus producingvalvular incompetency^ Although the co
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Diseases of the chest and the principles of physical diagnosis . raction of theventricles; (6) systolic tension of the auriculo-ventricular valves; (c)distention of the aorta and pulmonary artery. It is loudest over thebody of the heart but also heard over the base. It is normally louder aswell as longer (0.8 second) than the second sound (0.05 second) from 216 AUSCULTATION 217 which it is separated hj the short pause. Systole is shorter than dias-tole, therefore the first sound is preceded by the long pause. The Second Sound.—-The second sound marks the beginning of dias-tole, it is shorter, Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/diseases-of-the-chest-and-the-principles-of-physical-diagnosis-raction-of-theventricles-6-systolic-tension-of-the-auriculo-ventricular-valves-cdistention-of-the-aorta-and-pulmonary-artery-it-is-loudest-over-thebody-of-the-heart-but-also-heard-over-the-base-it-is-normally-louder-aswell-as-longer-08-second-than-the-second-sound-005-second-from-216-auscultation-217-which-it-is-separated-hj-the-short-pause-systole-is-shorter-than-dias-tole-therefore-the-first-sound-is-preceded-by-the-long-pause-the-second-sound-the-second-sound-marks-the-beginning-of-dias-tole-it-is-shorter-image340275131.htmlRM2ANGTB7–Diseases of the chest and the principles of physical diagnosis . raction of theventricles; (6) systolic tension of the auriculo-ventricular valves; (c)distention of the aorta and pulmonary artery. It is loudest over thebody of the heart but also heard over the base. It is normally louder aswell as longer (0.8 second) than the second sound (0.05 second) from 216 AUSCULTATION 217 which it is separated hj the short pause. Systole is shorter than dias-tole, therefore the first sound is preceded by the long pause. The Second Sound.—-The second sound marks the beginning of dias-tole, it is shorter,
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The development of the human body; a manual of human embryology . Fig. 134.—Diagrams showing the Development of the Auriculo-ventricular Valves.b, Muscular trabecular; cht, chords tendinese; mk and mkl, valve; pm, musculus papillaris; tc, columnar carneae; v, ventricle.— (From Hertwig, after Gegenbaur.) the columnce carneoz of the adult heart. Other bundlesmay retain a transverse direction, passing across the ven-tricular cavity and forming the so-called moderator bands;while others, again, retaining their attachment to thevalves, condense only at their lower ends to form the mus-culi papillar Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/the-development-of-the-human-body-a-manual-of-human-embryology-fig-134diagrams-showing-the-development-of-the-auriculo-ventricular-valvesb-muscular-trabecular-cht-chords-tendinese-mk-and-mkl-valve-pm-musculus-papillaris-tc-columnar-carneae-v-ventricle-from-hertwig-after-gegenbaur-the-columnce-carneoz-of-the-adult-heart-other-bundlesmay-retain-a-transverse-direction-passing-across-the-ven-tricular-cavity-and-forming-the-so-called-moderator-bandswhile-others-again-retaining-their-attachment-to-thevalves-condense-only-at-their-lower-ends-to-form-the-mus-culi-papillar-image342681377.htmlRM2AWEDGH–The development of the human body; a manual of human embryology . Fig. 134.—Diagrams showing the Development of the Auriculo-ventricular Valves.b, Muscular trabecular; cht, chords tendinese; mk and mkl, valve; pm, musculus papillaris; tc, columnar carneae; v, ventricle.— (From Hertwig, after Gegenbaur.) the columnce carneoz of the adult heart. Other bundlesmay retain a transverse direction, passing across the ven-tricular cavity and forming the so-called moderator bands;while others, again, retaining their attachment to thevalves, condense only at their lower ends to form the mus-culi papillar
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![A treatise on zoology . he right and left ductusCuvieri and the hepatic veins join to enter the sinus venosus. Thisleads into a thin-walled atrium, opening into a muscular thick-walled ventricle. There are two sinu-atrial and two atrio-ventricular valves. The ventricle is prolonged forwards into acontractile conns arteriosus, leading to the ventral aorta (Stohr[426], Boas [38-39], Kose [373]). Inside the conns are rows ofsemi-lunar valves (Fig. 69). In the more specialised Teleostei thebase of the aorta is swollen into a non-contractile bulbus, and theconus is reduced to a narrow strip support Stock Photo](https://c8.alamy.com/comp/2AJCX2D/a-treatise-on-zoology-he-right-and-left-ductuscuvieri-and-the-hepatic-veins-join-to-enter-the-sinus-venosus-thisleads-into-a-thin-walled-atrium-opening-into-a-muscular-thick-walled-ventricle-there-are-two-sinu-atrial-and-two-atrio-ventricular-valves-the-ventricle-is-prolonged-forwards-into-acontractile-conns-arteriosus-leading-to-the-ventral-aorta-stohr-426-boas-38-39-kose-373-inside-the-conns-are-rows-ofsemi-lunar-valves-fig-69-in-the-more-specialised-teleostei-thebase-of-the-aorta-is-swollen-into-a-non-contractile-bulbus-and-theconus-is-reduced-to-a-narrow-strip-support-2AJCX2D.jpg "A treatise on zoology . he right and left ductusCuvieri and the hepatic veins join to enter the sinus venosus. Thisleads into a thin-walled atrium, opening into a muscular thick-walled ventricle. There are two sinu-atrial and two atrio-ventricular valves. The ventricle is prolonged forwards into acontractile conns arteriosus, leading to the ventral aorta (Stohr[426], Boas [38-39], Kose [373]). Inside the conns are rows ofsemi-lunar valves (Fig. 69). In the more specialised Teleostei thebase of the aorta is swollen into a non-contractile bulbus, and theconus is reduced to a narrow strip support Stock Photo")
A treatise on zoology . he right and left ductusCuvieri and the hepatic veins join to enter the sinus venosus. Thisleads into a thin-walled atrium, opening into a muscular thick-walled ventricle. There are two sinu-atrial and two atrio-ventricular valves. The ventricle is prolonged forwards into acontractile conns arteriosus, leading to the ventral aorta (Stohr[426], Boas [38-39], Kose [373]). Inside the conns are rows ofsemi-lunar valves (Fig. 69). In the more specialised Teleostei thebase of the aorta is swollen into a non-contractile bulbus, and theconus is reduced to a narrow strip support Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/a-treatise-on-zoology-he-right-and-left-ductuscuvieri-and-the-hepatic-veins-join-to-enter-the-sinus-venosus-thisleads-into-a-thin-walled-atrium-opening-into-a-muscular-thick-walled-ventricle-there-are-two-sinu-atrial-and-two-atrio-ventricular-valves-the-ventricle-is-prolonged-forwards-into-acontractile-conns-arteriosus-leading-to-the-ventral-aorta-stohr-426-boas-38-39-kose-373-inside-the-conns-are-rows-ofsemi-lunar-valves-fig-69-in-the-more-specialised-teleostei-thebase-of-the-aorta-is-swollen-into-a-non-contractile-bulbus-and-theconus-is-reduced-to-a-narrow-strip-support-image338344677.htmlRM2AJCX2D–A treatise on zoology . he right and left ductusCuvieri and the hepatic veins join to enter the sinus venosus. Thisleads into a thin-walled atrium, opening into a muscular thick-walled ventricle. There are two sinu-atrial and two atrio-ventricular valves. The ventricle is prolonged forwards into acontractile conns arteriosus, leading to the ventral aorta (Stohr[426], Boas [38-39], Kose [373]). Inside the conns are rows ofsemi-lunar valves (Fig. 69). In the more specialised Teleostei thebase of the aorta is swollen into a non-contractile bulbus, and theconus is reduced to a narrow strip support
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The physiology of the circulation in plants : in the lower animals, and in man : being a course of lectures delivered at surgeons' hall to the president, fellows, etc of the Royal college of surgeons of Edinburgh, in the summer of 1872 . Fig. 81.—Anterior aspect of turkeys heart, showing great vessels, with right and left ven-tricles opened to show aurieulo-ventricular valves, a, Aorta arching to right side and divid-ing into three brandies, two of which (b) go to right side, and one (c) to left side, d, Pulmonaryartery dividing into two, and sending a branch to right and left lungs, i, Muscul Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/the-physiology-of-the-circulation-in-plants-in-the-lower-animals-and-in-man-being-a-course-of-lectures-delivered-at-surgeons-hall-to-the-president-fellows-etc-of-the-royal-college-of-surgeons-of-edinburgh-in-the-summer-of-1872-fig-81anterior-aspect-of-turkeys-heart-showing-great-vessels-with-right-and-left-ven-tricles-opened-to-show-aurieulo-ventricular-valves-a-aorta-arching-to-right-side-and-divid-ing-into-three-brandies-two-of-which-b-go-to-right-side-and-one-c-to-left-side-d-pulmonaryartery-dividing-into-two-and-sending-a-branch-to-right-and-left-lungs-i-muscul-image338510338.htmlRM2AJMDAX–The physiology of the circulation in plants : in the lower animals, and in man : being a course of lectures delivered at surgeons' hall to the president, fellows, etc of the Royal college of surgeons of Edinburgh, in the summer of 1872 . Fig. 81.—Anterior aspect of turkeys heart, showing great vessels, with right and left ven-tricles opened to show aurieulo-ventricular valves, a, Aorta arching to right side and divid-ing into three brandies, two of which (b) go to right side, and one (c) to left side, d, Pulmonaryartery dividing into two, and sending a branch to right and left lungs, i, Muscul
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. Diseases of the heart and arterial system : designed to be a practical presentation of the subject for the use of students and practitioners of medicine . Fig. 24.—Veeriicose Endocarditis of Aortic and Mitral Valves.Specimen in collection of Dr. Gustav Futterer. on the free margins of the valve-cusps, but along a line correspond-ing to the point of maximum contact when the valves close (Fig.24). In the case of the auriculo-ventricular valves this is on theauricular surface, while on the semilunar valves it is on the ven-tricular surface. From these facts it is evident that the work thatthe v Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/diseases-of-the-heart-and-arterial-system-designed-to-be-a-practical-presentation-of-the-subject-for-the-use-of-students-and-practitioners-of-medicine-fig-24veeriicose-endocarditis-of-aortic-and-mitral-valvesspecimen-in-collection-of-dr-gustav-futterer-on-the-free-margins-of-the-valve-cusps-but-along-a-line-correspond-ing-to-the-point-of-maximum-contact-when-the-valves-close-fig24-in-the-case-of-the-auriculo-ventricular-valves-this-is-on-theauricular-surface-while-on-the-semilunar-valves-it-is-on-the-ven-tricular-surface-from-these-facts-it-is-evident-that-the-work-thatthe-v-image369671164.htmlRM2CDBY9G–. Diseases of the heart and arterial system : designed to be a practical presentation of the subject for the use of students and practitioners of medicine . Fig. 24.—Veeriicose Endocarditis of Aortic and Mitral Valves.Specimen in collection of Dr. Gustav Futterer. on the free margins of the valve-cusps, but along a line correspond-ing to the point of maximum contact when the valves close (Fig.24). In the case of the auriculo-ventricular valves this is on theauricular surface, while on the semilunar valves it is on the ven-tricular surface. From these facts it is evident that the work thatthe v
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. A text-book of physiology : for medical students and physicians . ation of at least two factors,—a valvularelement due to the vibration of the auriculo-ventricular valves, anda muscular element due to the vibration of the contracting muscularmass. Accepting this view, there is a further difficulty in explain-ing the origin of the muscular element. According to some, it isdue to the fact that the contraction of the muscle fibers is not 554 CIRCULATION OF BLOOD AND LYMPH. simultaneous throughout the ventricle and the friction of the inter-lacing fibers sets up vibration in the muscular mass; a Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/a-text-book-of-physiology-for-medical-students-and-physicians-ation-of-at-least-two-factorsa-valvularelement-due-to-the-vibration-of-the-auriculo-ventricular-valves-anda-muscular-element-due-to-the-vibration-of-the-contracting-muscularmass-accepting-this-view-there-is-a-further-difficulty-in-explain-ing-the-origin-of-the-muscular-element-according-to-some-it-isdue-to-the-fact-that-the-contraction-of-the-muscle-fibers-is-not-554-circulation-of-blood-and-lymph-simultaneous-throughout-the-ventricle-and-the-friction-of-the-inter-lacing-fibers-sets-up-vibration-in-the-muscular-mass-a-image370180701.htmlRM2CE7579–. A text-book of physiology : for medical students and physicians . ation of at least two factors,—a valvularelement due to the vibration of the auriculo-ventricular valves, anda muscular element due to the vibration of the contracting muscularmass. Accepting this view, there is a further difficulty in explain-ing the origin of the muscular element. According to some, it isdue to the fact that the contraction of the muscle fibers is not 554 CIRCULATION OF BLOOD AND LYMPH. simultaneous throughout the ventricle and the friction of the inter-lacing fibers sets up vibration in the muscular mass; a
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. Diseases of the heart and arterial system; Designed to be a practical presentation of the subject for the use of students and practitioners of medicine. Fig. 24.—Verrucose Endocarditis of Aortic and Mitral Valves.Specimen in collection of Dr. Gustav Fiitterer. on the free margins of the valve-cusps, but along a line correspond-ing to the point of maximum contact when the valves close (Fig.24). In the case of the auriculo-ventricular valves this is on theauricular surface, while on the semilunar A^alves it is on the ven-tricular surface. From these facts it is evident that the work thatthe va Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/diseases-of-the-heart-and-arterial-system-designed-to-be-a-practical-presentation-of-the-subject-for-the-use-of-students-and-practitioners-of-medicine-fig-24verrucose-endocarditis-of-aortic-and-mitral-valvesspecimen-in-collection-of-dr-gustav-fiitterer-on-the-free-margins-of-the-valve-cusps-but-along-a-line-correspond-ing-to-the-point-of-maximum-contact-when-the-valves-close-fig24-in-the-case-of-the-auriculo-ventricular-valves-this-is-on-theauricular-surface-while-on-the-semilunar-aalves-it-is-on-the-ven-tricular-surface-from-these-facts-it-is-evident-that-the-work-thatthe-va-image370725792.htmlRM2CF40ET–. Diseases of the heart and arterial system; Designed to be a practical presentation of the subject for the use of students and practitioners of medicine. Fig. 24.—Verrucose Endocarditis of Aortic and Mitral Valves.Specimen in collection of Dr. Gustav Fiitterer. on the free margins of the valve-cusps, but along a line correspond-ing to the point of maximum contact when the valves close (Fig.24). In the case of the auriculo-ventricular valves this is on theauricular surface, while on the semilunar A^alves it is on the ven-tricular surface. From these facts it is evident that the work thatthe va
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. A laboratory manual and text-book of embryology. Embryology. PRIMITIVE BLOOD VASCULAR SYSTEM 267 velopment of the septum membranaceum the interventricular foramen is closed. The atrio-ventricular valves arise as thickenings of the endocardium and endo- cardial cushions of the atrio-ventricular foramina. Three such thickenings are formed on the right, two on the left. The anlages of the valves are at first thick and project into the ventricles. Later, as the ventricular wall differentiates, the valvular anlages are undermined, leaving their edges attached to the ventricular walls by muscular Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/a-laboratory-manual-and-text-book-of-embryology-embryology-primitive-blood-vascular-system-267-velopment-of-the-septum-membranaceum-the-interventricular-foramen-is-closed-the-atrio-ventricular-valves-arise-as-thickenings-of-the-endocardium-and-endo-cardial-cushions-of-the-atrio-ventricular-foramina-three-such-thickenings-are-formed-on-the-right-two-on-the-left-the-anlages-of-the-valves-are-at-first-thick-and-project-into-the-ventricles-later-as-the-ventricular-wall-differentiates-the-valvular-anlages-are-undermined-leaving-their-edges-attached-to-the-ventricular-walls-by-muscular-image232344729.htmlRMRE0621–. A laboratory manual and text-book of embryology. Embryology. PRIMITIVE BLOOD VASCULAR SYSTEM 267 velopment of the septum membranaceum the interventricular foramen is closed. The atrio-ventricular valves arise as thickenings of the endocardium and endo- cardial cushions of the atrio-ventricular foramina. Three such thickenings are formed on the right, two on the left. The anlages of the valves are at first thick and project into the ventricles. Later, as the ventricular wall differentiates, the valvular anlages are undermined, leaving their edges attached to the ventricular walls by muscular
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