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首页 - 英汉词典 - Y字开头的单词或词组 - yolk sac

英语解释

yolk sac

汉语翻译

卵黄囊
【医】卵黄囊

yolk sac英语解释

名词 yolk sac:

membranous structure that functions as the circulatory system in mammal embryos until the heart becomes functional
同义词：vitelline sac, umbilical vesicle, vesicula umbilicus
membranous structure enclosing the yolk of eggs in birds reptiles marsupials and some fishes; circulates nutrients to the developing embryo

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