yolk sac

(redirected from Yolk sac cavity)
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Related to Yolk sac cavity: Yolk sac tumor, yolk sac placenta
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Synonyms for yolk sac

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

membranous structure enclosing the yolk of eggs in birds, reptiles, marsupials, and some fishes

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