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28 November, 15:02

What are the main types of stem cell and where do they come from

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  1. 28 November, 18:46
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    Embryonic stem cells.

    These stem cells come from embryos that are three to five days old. At this stage, an embryo is called a blastocyst and has about 150 cells. These are pluripotent (ploo-RIP-uh-tunt) stem cells, meaning they can divide into more stem cells or can become any type of cell in the body.
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