tro·pho·blast 
(trōfə-blăst′)
(trōfə-blăst′)n.
The outermost layer of cells of the mammalian blastocyst that attaches the fertilized ovum to the uterine wall and serves as a nutritive pathway for the embryo.
tro′pho·blastic adj.
| 单词 | trophoblast |
| 释义 | tro·pho·blast (trōfə-blăst′)n. The outermost layer of cells of the mammalian blastocyst that attaches the fertilized ovum to the uterine wall and serves as a nutritive pathway for the embryo. tro′pho·blastic adj. |
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