Elementary text-book of zoology. Prokalymma. Note the yolk-sac villi, but none to the allantois. Fig. 341.—Diagram of Hypsoprymnus (A Kangaroo) Embryo IN ITS Fcetal Membranes. (Modified from Semon.) Amnion. Yolk-sac. Allantois..
Fetal membranes - Wikipedia
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Amniota | animal group | Britannica
Cunningham's Text-book of anatomy. Anatomy. Xeuxal tube Ectoderm of amnion Mesoderm amnion Trophoblast of chorion Paraxial mesoderm Jntermediate cell tract Splanchnic and /somatic layers of lateral rjlate meso. Embryonic coelom Amnion
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The placenta, umbilical cord, and amniotic sac - Knowledge @ AMBOSS
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Elementary text-book of zoology. Yolk-sac. Embryo. miotic Cavity.. Yolk-sac. A, Stage of tbe Frog witb only small Yolk-sac ; B, Stage of the Skate ; ^, Stage of Developing Amnion ;
A text-book of agricultural zoology. Zoology, Economic. DEVELOPMENT OF MAMMALIA. 429 attached to the parent by means of a membrane called the placenta, which more or less closely unites the foetus
Comparative aspects of trophoblast development and placentation | Reproductive Biology and Endocrinology | Full Text
Amnion - Wikipedia
Sacul amniotic: tot ce trebuie sa stii
Amniotic sac - Wikipedia
Amniotic fluid: what is it and what is it used for in pregnancy?