depinisyon kahulugan
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doc Definition of yolk sac
    English to English
    noun
  • membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional
  • source: WordNet 3.0
  • membranous structure enclosing the yolk of eggs in birds, reptiles, marsupials, and some fishes; circulates nutrients to the developing embryo
  • source: WordNet 3.0
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