最近学习干细胞,请坛友指点一下,三胚层多潜能干细胞( pluripotent stem cell )来源? 我这里看到这句话,请看:The pluripotent differentiation potential of stem cells is defined by the ability to differentiate into cell types characteristic of any of the three developmental germ layers. Cells with this capacity have been found in fetal and adult cell sources. 胎儿和成体都有来源,请问胎儿有哪些?成体又有哪些?