Why are our bodies not capable of regrowing limbs but can regenerate skin after a scrape or bone after a fracture?
In: Biology
The cells that specialize into long bones and that sort of muscle aren’t _everywhere_ in your body. It happens initially that your body grows one of everything, but not extra parts.
The localized re-growth is because there _are_ fix-it cells that are in the area of big patches of skin, and in (some) bone to re-grow it. Arm bones, leg bones, yes. Skull, not so much.
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