yolk sac

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• 5. marts 2016 fra wordnet.princeton.edu

  yolk sac — navneord — engelsk

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

• 5. marts 2016 fra wordnet.princeton.edu

  yolk sac — navneord — engelsk

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