yolk sac
yolk sac是什么意思、yolk sac怎么读
卵黄囊\n【医】 卵黄囊
yolk sac汉语翻译
卵黄囊<br>【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