If we make skin and muscle cells when we heal cuts and heal/generate bones after breaking them, why wouldn’t we be able to grow a finger if one is cut off?
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When you’re young you kinda can.
Friend’s baby lost perhaps half his finger in an accident with a stroller quite a few years ago, and perhaps a year later it had grown back.
My wife lost the tip of her finger in an accident with a wedding gift knife a week or so after we were married. It was cut on the side, nearly down to the bone, through the nail. The docs pulled the rest of her nail off to stitch it back together (we’d kept the piece). The piece ended up not reconnecting and dried and fell off soon thereafter. But the tip regrew and the nail did too, and you would have to look closely to see the scar now, and the nail appears fully normal.
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