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Noun: vitelline sac
  1. Membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional
    - yolk sac, umbilical vesicle, vesicula umbilicus

Derived forms: vitelline sacs

Type of: sac

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vitamin K3
vitamin M
vitamin P
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vitamin-deficiency diet
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vitellarium
vitelline
vitelline circulation
vitelline sac
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Vithar
Vitharr
Viti Levu
vitiate
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viticulture
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