Anatomy [A] » Tissues [A10] » Membranes » Extraembryonic Membranes » Allantois
Anatomy [A] » Embryonic Structures [A16] » Embryo, Mammalian » Extraembryonic Membranes » Allantois
Description
An extra-embryonic membranous sac derived from the YOLK SAC of REPTILES; BIRDS; and MAMMALS. It lies between two other extra-embryonic membranes, the AMNION and the CHORION. The allantois serves to store urinary wastes and mediate exchange of gas and nutrients for the developing embryo. MeSH
Hierarchy View
Hierarchy Tree View
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