Tuesday, December 22, 2009

Why do we have toe nails and finger nails?

Our nails are the human equivalent of claws, talons, and hooves. Twenty thousand years ago (give or take a few) our ancestors used their nails, both finger and toe, for the same reasons that modern apes use theirs: tearing bits of food apart, picking bugs out of their hair, gripping, scraping, etc. Thanks to the advent of handy gadgets such as tweezers and back scratchers, our nails aren’t completely necessary any more – we could live without them, theoretically – but they’re still quite useful. Some people say that nails help to protect our digits, but there seems to be more argument that they exist for purposes of manipulation – their use as “tools” – rather than fortification for the ends of our fingers.Why do we have toe nails and finger nails?
nails are a part of the system in our body that protects us from certain pathogens. i think its called the integumentary system (along with hair and skin)

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