. A text-book of comparative physiology for students and practitioners of comparative (veterinary) medicine. Physiology, Comparative. THE DEVELOPMENT OF THE EMBRYO ITSELF. 105 crease in the curvature of the heart and its complexity of struct- ure by divisions ; the appearance of additional aortic arches and of the cardinal veins ; the formation of four visceral clefts and five visceral arches ; a series of progressive changes in Fig. 109.—Diagram of circnlation of yelk-sac at end of third day (Foster and Bal- four). Blastoderm seen from below. Arteries made black. H, heart; AA, sec- ond,
. A text-book of comparative physiology for students and practitioners of comparative (veterinary) medicine. Physiology, Comparative. THE DEVELOPMENT OF THE EMBRYO ITSELF. 105 crease in the curvature of the heart and its complexity of struct- ure by divisions ; the appearance of additional aortic arches and of the cardinal veins ; the formation of four visceral clefts and five visceral arches ; a series of progressive changes in Fig. 109.—Diagram of circnlation of yelk-sac at end of third day (Foster and Bal- four). Blastoderm seen from below. Arteries made black. H, heart; AA, sec- ond, third, and fourth aortic arches; AO, dorsal aorta; , left vitelline artery; S. of. A. right vitelline artery; S. T, sinus terminalis; L. of, left vitelline vein; , right vitelline vein; S. Y, sinus venosns; S. C, ductne Cuvierl; 5. Ca. V, superior cardinal or jugular vein; V. Ca, inferior cardinal vein. the organs of the special senses, such as the formation of the lens of the eye and a secondary optic vesicle ; the closing in of the optic vesicle ; and the formation of the nasal pits. In the region of the future brain, the vesicles of the cerebral hemi- spheres become distinct; the hind-brain separates into cere-. 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 Mills, Wesley, 1847-1915. New York, Appleton
Size: 1610px × 1551px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthormillswes, bookcentury1800, bookdecade1890, bookyear1890
