Article: If fingernails are dead cells, why do they grow?(Ask Doctor Cory)

Dear Dr. Cory:

If fingernails are dead cells, why do they grow?

Dear Samantha:

It is true, fingernails and toenails are dead and hardened keratin (CARE-uh-tin) cells. They provide tough protection for the nailbeds beneath them. Fingernails have no feeling except at the root from which they grow. ...

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