. A text-book of comparative physiology for students and practitioners of comparative (veterinary) medicine. Physiology, Comparative. Fio. 76.—Diagrammatic longitadlnal section throngh the axis of an embiyo chick (after Foster and Balfour). N. C, Neural canal; Oh, notocbord; Fg, foregut; F. So, somatopleure; F. Sp, splanchnopleure; Sp, splanchnopleure, forming lower wall of foregut; Ht, heart; ^, pleuroperitoneal cavity; Am, amniotic fold; F, epiblast; M, mesoblast; H, hypoblast. other, meet after being joined by corresponding lateral folds. Fusion and absorption result at this meeting-point,
. A text-book of comparative physiology for students and practitioners of comparative (veterinary) medicine. Physiology, Comparative. Fio. 76.—Diagrammatic longitadlnal section throngh the axis of an embiyo chick (after Foster and Balfour). N. C, Neural canal; Oh, notocbord; Fg, foregut; F. So, somatopleure; F. Sp, splanchnopleure; Sp, splanchnopleure, forming lower wall of foregut; Ht, heart; ^, pleuroperitoneal cavity; Am, amniotic fold; F, epiblast; M, mesoblast; H, hypoblast. other, meet after being joined by corresponding lateral folds. Fusion and absorption result at this meeting-point, in the inelosure of one cavity and the blending of two others. These folds constitute the amniotic membranes, the inner of which. Fig. 77.—Diagrammatic longitudinal section of a chick of the fourth day (after Allen Thomson), ep. epiblast; hy, hypoblast; em, somatopleure; vm, splanchnopleure; af, pf, folds of the amnion; 2>P, pleuroperitoneal cavity; am, cavity of the am- nion; al. allantois; a, position of the future anus; h, heart; i, intestme; vi, vitel- line duct; 1/8, yelk; s, foregut; m, position of the mouth; me, mesentery. forms the true amnion, the outer the false amnion (serous mem- brane, subzonal membrane). Within the amnion proper is the amniotic cavity filled with fluid (liquor amnii), while the space between the true and false amniotic folds, which gradually in-. 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
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