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Description Fig. 84. — Diagrams illustrating the development of the amnion and allantois. The upper Figure (.4), a cross section of an earlier stage, shows the amniotic folds rising above the embryo. The lower Figure (B), a longitudinal section of a later stage, shows the allantois as well as the completely closed amnion. In most mammals the fused allantois and serosa (chorion) form the foetal placenta. Ectoderm in diagram is striped, mesoderm stippled in black, endoderm stippled in white.
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Source https://archive.org/details/comparativeanato00neal/page/114/mode/1up?view=theater Comparative Anatomy, Publisher: Philadelphia : P. Blakiston's Son
Author Neal, Herbert V. (Herbert Vincent), 1869-1940; Rand, Herbert W.

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current20:22, 10 June 2024Thumbnail for version as of 20:22, 10 June 2024676 × 902 (1.05 MB)Rasbak (talk | contribs){{Information |description=Fig. 84. — Diagrams illustrating the development of the amnion and allantois. The upper Figure (.4), a cross section of an earlier stage, shows the amniotic folds rising above the embryo. The lower Figure (B), a longitudinal section of a later stage, shows the allantois as well as the completely closed amnion. In most mammals the fused allantois and serosa (chorion) form the foetal placenta. Ectoderm in diagram is striped, mesoderm stippled in black, endoderm stippl...

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