. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). 80 IN VEUTKBliA TE MOliPUOLOO Y. â A* "i. Fio. 40.â^ = Eplthelio- inusculur cell of C'u'leiu turulo ; B = iniiscuiiir coll; C = seusory cell. lio-muscular, niiiuculur, glandular, and nerve cells are gener- ally to be found in it. The epitlielio-iuuscular cells (Fig. 40, A) sire the most numerous uml consist of columnar colls, one extremity of which bears a cilium and helps to form the outer surface of the body, while the other is prolonged into a somewhat spindle
![. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). 80 IN VEUTKBliA TE MOliPUOLOO Y. â A* "i. Fio. 40.â^ = Eplthelio- inusculur cell of C'u'leiu turulo ; B = iniiscuiiir coll; C = seusory cell. lio-muscular, niiiuculur, glandular, and nerve cells are gener- ally to be found in it. The epitlielio-iuuscular cells (Fig. 40, A) sire the most numerous uml consist of columnar colls, one extremity of which bears a cilium and helps to form the outer surface of the body, while the other is prolonged into a somewhat spindle Stock Photo](https://c8.alamy.com/comp/RJ4PF3/a-textbook-of-invertebrate-morphology-microform-invertebrates-morphology-animals-invertbrs-morphologie-animaux-80-in-veutkblia-te-molipuoloo-y-a-quoti-fio-40-=-eplthelio-inusculur-cell-of-culeiu-turulo-b-=-iniiscuiiir-coll-c-=-seusory-cell-lio-muscular-niiiuculur-glandular-and-nerve-cells-are-gener-ally-to-be-found-in-it-the-epitlielio-iuuscular-cells-fig-40-a-sire-the-most-numerous-uml-consist-of-columnar-colls-one-extremity-of-which-bears-a-cilium-and-helps-to-form-the-outer-surface-of-the-body-while-the-other-is-prolonged-into-a-somewhat-spindle-RJ4PF3.jpg)
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. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). 80 IN VEUTKBliA TE MOliPUOLOO Y. â A* "i. Fio. 40.â^ = Eplthelio- inusculur cell of C'u'leiu turulo ; B = iniiscuiiir coll; C = seusory cell. lio-muscular, niiiuculur, glandular, and nerve cells are gener- ally to be found in it. The epitlielio-iuuscular cells (Fig. 40, A) sire the most numerous uml consist of columnar colls, one extremity of which bears a cilium and helps to form the outer surface of the body, while the other is prolonged into a somewhat spindle-shaped process of highl}' contractile muscular substance. The muscle-cells (Fig. 40, Ji) are modi- fications of these, having lost their connection with the surface of the body, the cell-protoplasm and nucleus form- ing a small elevation on the muscle- libre. The muscle-Hbres rest upon the outer surface of* the mesoghea, and in the ectoderm are, as ji rule, arranged longitudinally, so that by their contraction they cause a shortening or retraction of the polyp. The nerve- cells are of two kinds: (1) sensory cells (Fig. 40, ('), which are slender cells whose free end bears a single cilium, while the inner end is produced into one or more slender nerve-proc- es.ses which are supi)osed to place these cells in connection with (2) the ganglion-cells. These are stellate cells lying in the deeper layers of the ectoderm, just external to the muscle- cells, and sending off delicate processes in various directions so as to form a i)lexus of nerve-fibres ramifying through the ectoderm. The mesogkra is thin and more or less fibrous in structure, and rarely contains cells. The endoderm-cells are large and are of the epithelio-muscular variety, the muscle-fibres hav- ing a circular arrangement producing by their contraction a diminution of the diameter of the polyp. The proto])lasmic portion of each cell is furnished with a single flagellum and is digestive in function, taking food-pa