英语词汇“yolk sac”的意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-金博士网

单词	yolk sac
释义	yolk sac 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
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yolk sac