英语词汇“yolk sac”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

Yolk Sac

nnoun.animalmembranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional

Synset:umbilical vesicle vesicula umbilicus vitelline sac

Hypernyms:sac

Inherited Hypernyms:yolk sacsaccavitystructurebody partpartthingphysical entityentity

nnoun.animalmembranous structure enclosing the yolk of eggs in birds, reptiles, marsupials, and some fishes; circulates nutrients to the developing embryo

Hypernyms:sac

Inherited Hypernyms:yolk sacsaccavitystructurebody partpartthingphysical entityentity

单词	yolk sac
释义	Yolk Sac nnoun.animalmembranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional Synset:umbilical vesicle vesicula umbilicus vitelline sac Hypernyms:sac Inherited Hypernyms:yolk sacsaccavitystructurebody partpartthingphysical entityentity nnoun.animalmembranous structure enclosing the yolk of eggs in birds, reptiles, marsupials, and some fishes; circulates nutrients to the developing embryo Hypernyms:sac Inherited Hypernyms:yolk sacsaccavitystructurebody partpartthingphysical entityentity
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