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blastosphere是什么意思

blastosphere

美[b'lɑːstɒsfr]  英[b'lɑːstɒsfr]
sp.  囊胚
  近义词:blastula,

英英释义

Noun
  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
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