. Outlines of the comparative physiology and morphology of animals. Anatomy, Comparative; Physiology, Comparative. THE NERVOUS SYSTEM OF MAN. 37 Embryonic Development of Brain.—The funda- mental fact that the brain may be regarded as an inter- cranial continuation of the spinal cord, with swellings and outgrowths atop, is made evident by its em- bryonic development. The following figures give the stages of this develop- ment. In the very early stages the brain is a direct continuation of the Spinal FlG- 21.—Diagram showing the inter- lacing of dendrites of neurones. cord and consists of three
![. Outlines of the comparative physiology and morphology of animals. Anatomy, Comparative; Physiology, Comparative. THE NERVOUS SYSTEM OF MAN. 37 Embryonic Development of Brain.—The funda- mental fact that the brain may be regarded as an inter- cranial continuation of the spinal cord, with swellings and outgrowths atop, is made evident by its em- bryonic development. The following figures give the stages of this develop- ment. In the very early stages the brain is a direct continuation of the Spinal FlG- 21.—Diagram showing the inter- lacing of dendrites of neurones. cord and consists of three Stock Photo](https://c8.alamy.com/comp/RE0E21/outlines-of-the-comparative-physiology-and-morphology-of-animals-anatomy-comparative-physiology-comparative-the-nervous-system-of-man-37-embryonic-development-of-brainthe-funda-mental-fact-that-the-brain-may-be-regarded-as-an-inter-cranial-continuation-of-the-spinal-cord-with-swellings-and-outgrowths-atop-is-made-evident-by-its-em-bryonic-development-the-following-figures-give-the-stages-of-this-develop-ment-in-the-very-early-stages-the-brain-is-a-direct-continuation-of-the-spinal-flg-21diagram-showing-the-inter-lacing-of-dendrites-of-neurones-cord-and-consists-of-three-RE0E21.jpg)
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. Outlines of the comparative physiology and morphology of animals. Anatomy, Comparative; Physiology, Comparative. THE NERVOUS SYSTEM OF MAN. 37 Embryonic Development of Brain.—The funda- mental fact that the brain may be regarded as an inter- cranial continuation of the spinal cord, with swellings and outgrowths atop, is made evident by its em- bryonic development. The following figures give the stages of this develop- ment. In the very early stages the brain is a direct continuation of the Spinal FlG- 21.—Diagram showing the inter- lacing of dendrites of neurones. cord and consists of three hollow swellings or vesicles. These are what afterward become medulla (1), optic lobes (2), and thalamus (3). >' A. Fig. 22. We shall call these the hindbrain, the midbrain, and the forebrain (Fig. 22). The next step is the outgrowth of the cerebrum (cr) and olfactory lobes (of) from the fore-. 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 resemble the original work.. LeConte, Joseph, 1823-1901. New York, D. Appleton and Company