yolk sac
读音
汉语翻译
卵黄囊【医】 卵黄囊
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
赞
纠错