The elements of embryology (1883) The elements of embryology elementsofembryo00fost Year: 1883 376 DEVELOPMENT OF ORGANS IN MAMMALIA. [CHAP. to the nature of the pineal gland. It appears to possess in all forms an epithelial structure, but, except at the base of the stalk (infra-pineal process) in Mammalia, in the wall of which there are nerve-fibres, no nervous structures are present in it in the adult state. The cerebral hemispheres. It will be convenient to treat separately the development of the cerebral hemispheres proper, and that of the olfactory lobes. In the cerebral rudiment two par
The elements of embryology (1883) The elements of embryology elementsofembryo00fost Year: 1883 376 DEVELOPMENT OF ORGANS IN MAMMALIA. [CHAP. to the nature of the pineal gland. It appears to possess in all forms an epithelial structure, but, except at the base of the stalk (infra-pineal process) in Mammalia, in the wall of which there are nerve-fibres, no nervous structures are present in it in the adult state. The cerebral hemispheres. It will be convenient to treat separately the development of the cerebral hemispheres proper, and that of the olfactory lobes. In the cerebral rudiment two parts may be dis- tinguished, viz. the floor and the roof. The former gives rise to the ganglia at the base of the hemispheres, the corpora striata, the latter to the hemispheres proper. The first change which takes place consists in the roof growing out into two lobes, between which a shallow median constriction makes its appearance (Fig. 121). Diagrammatic Longitudinal Horizontal Section through the fore-brain. third ventricle ; Iv. lateral ventricle ; It. lamina terminalis ; ce. cerebral hemisphere ; optic thalamus.
Size: 1525px × 1312px
Photo credit: © Bookworm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
