大部分的人,都不知道這件事
Embryonic stem cell - Wikipedia, the free encyclopedia 你知道嗎? 小狗狗,過來!! 乖~~ Embryonic stem cells (ES cells) are pluripotent stem cells derived from the inner cell mass of a blastocyst, an early-stage preimplantation embryo.[1][2] Human embryos reach the blastocyst stage 4–5 days post fertilization, at which time they consist of 5...
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