為您提供blastula英英釋意。" />

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首頁英語詞典blastulablastula英英釋意

blastula

英 ['bl?stj?l?] 美['bl?st??l?]
  • n. [胚] 囊胚，囊胚泡

英英釋意

1. early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs