[attach]14782[/attach] T5 D5 B/ {0 r, {0 Fblastocyst:It possesses an inner cell mass (ICM), or embryoblast, which subsequently forms the embryo, and an outer layer of cells, or trophoblast, which later forms the placenta." k( `: s n* l
土问:囊胚到原肠胚时表层细胞不是形成内外胚层了吗?为什么概念里说囊胚外面的细胞不发育成胚胎??? p, S) e5 }! |5 V D' O0 I( X) Y是不是不是同一个东东?帮忙指导一下,是在是想不通…………一个脑袋两头大…………作者: hyde 时间: 2010-10-4 20:02
是不是形成原肠胚的就是inner cell mass (ICM),在囊胚外还有一层????作者: zhaoyan1983 时间: 2010-10-4 20:18