Yolk sac
volume
British pronunciation/jˈəʊk sˈak/
American pronunciation/jˈoʊk sˈæk/

Definice a Význam "yolk sac"

01

membranous structure enclosing the yolk of eggs in birds, reptiles, marsupials, and some fishes; circulates nutrients to the developing embryo

02

membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional

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