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Blastocyst zh-hans.svg
Gray's subject #6 46
卡内基分期 3
日数 6
前体 囊胚
发展结果 上胚叶(epiblast)与下胚叶(hypoblast)

内细胞团(英语:Inner cell mass,缩写:ICM、内细胞群)是大多数真兽类哺乳动物在胚胎发生中的一个早期阶段,又称胚细胞embryoblast)。是一团位于初期胚胎中的一个细胞团块,也是最后将会发育成为胎儿的部位。




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