YOLK SAC
\jˈə͡ʊk sˈak], \jˈəʊk sˈak], \j_ˈəʊ_k s_ˈa_k]\
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membranous structure that functions as the circulatory system in mammal embryos until the heart becomes functional
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membranous structure enclosing the yolk of eggs in birds reptiles marsupials and some fishes; circulates nutrients to the developing embryo
By Princeton University
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membranous structure that functions as the circulatory system in mammal embryos until the heart becomes functional
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membranous structure enclosing the yolk of eggs in birds reptiles marsupials and some fishes; circulates nutrients to the developing embryo
By DataStellar Co., Ltd
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An embryonic membrane formed from endoderm and mesoderm. In reptiles and birds it incorporates the yolk into the digestive tract for nourishing the embryo. In placental mammals its nutritional function is vestigial; however, it is the source of most of the intestinal mucosa and the site of formation of the germ cells. It is sometimes called the vitelline sac, which should not be confused with the vitelline membrane of the egg.
By DataStellar Co., Ltd
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