yolk sac
yolk sac是什么意思、yolk sac怎么读
yolk sac汉语翻译
卵黄囊
【医】 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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