(1) The embryonic stem cell 胚胎干细胞 P Embryonic stem cells (ES cells) are pluripotent stem cells derived from the inner cell mass of the blastocyst, an early-stage embryo Blastocysts Contain Pluripotential Stem Cells About 4 days in cultur Morula 来自胚泡内细胞团或早期 胚胎; Cell Mass 具有多向分化潜能。 trophoblast 3 incubator embryonic stem cell9 ◆Embryonic stem cells (ES cells) are pluripotent stem cells derived from the inner cell mass of the blastocyst, an early-stage embryo. embryonic stem cell （1）The embryonic stem cell 胚胎干细胞 来自胚泡内细胞团或早期 胚胎； 具有多向分化潜能