Wednesday, February 10, 2010

Why the nails are grow only at the tip of the hand and digits?

';keratinization';





look at the nail portion of this webpageWhy the nails are grow only at the tip of the hand and digits?
They are leftovers from our ancestors who devloped claws to dig holes or to catch prey. If it wasn't for evolution, we wouldn't need to have been ';provided'; with nails.





Also, nails are hair in a different form.

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