. The development of the chick; an introduction to embryology. Birds -- Embryology. So//}'//. ^'â â¢''l^/./>/. *ry>^'^ Fig. 54. â Transverse section through the same embryo a short distance in front of the anterior intestinal portal. For explanation of letters see preceding figure; in addition: Ph., Pharynx. Som'pl., Somatopleure. Spl'pl., Splanchnopleure. v. M., Ventral :)4?/>/ Fig. 54 A. â Transverse section through the head of a 10 s embryo. The region of the section is near the center of the hind brain. Ao., Aorta. End'c, Endocardium. End'c. S., Endocardial septum. H.
. The development of the chick; an introduction to embryology. Birds -- Embryology. So//}'//. ^'â â¢''l^/./>/. *ry>^'^ Fig. 54. â Transverse section through the same embryo a short distance in front of the anterior intestinal portal. For explanation of letters see preceding figure; in addition: Ph., Pharynx. Som'pl., Somatopleure. Spl'pl., Splanchnopleure. v. M., Ventral :)4?/>/ Fig. 54 A. â Transverse section through the head of a 10 s embryo. The region of the section is near the center of the hind brain. Ao., Aorta. End'c, Endocardium. End'c. S., Endocardial septum. H. B., Hind brain. My'c, Myocardium, p. C, Parietal cavity. Ph., pharynx. So'pl., Somatopleure. SpFpl., Splanchnopleure. v. M., Ventral mesentery. The Neuropore. From the place where the neural folds first meet, the elevation and fusion proceed both forwards and back- wards in a continuous fashion (cf. Figs. 59, 61, 65, etc.). Although the open anterior stretch of the neural tube is very short in com- parison to the posterior open part, it is not until about the 12 s. 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 Lillie, Frank Rattray, 1870-1947. New York, Holt
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