What are stem cells? Stem cells are cells that can become anything else. For example they can become liver cells, heart cells,etc. There are 2 types of stem cells there are adult stem cells and embryonic cells. People think that stem cells are bad. Mostly because they only now what embryonic stem cells. Embryonic stem cells are bad because they destroy other cells. But they don't know about adult stem cells which are very helpful. They can cure diseases and can be used for medicine. They are actually really helpful. At least adult stem cells are! Embryonic stem cells come from an embryo which is 3-5 days old. Adult stem cells come from many things such as bone marrow blood vessels ,etc.Stem cells can treat burns, parkinson, etc... Well thats all.
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Blade 
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