AI overview
A nail is a hard, pointed projection that grows from the end of your fingers and toes, made of layers of a protein called keratin. Nails protect the sensitive tips of your digits and help you grip and manipulate objects with precision.
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Article
A nail is a protective plate characteristically found at the tip of the digits (fingers and toes) of almost all primates (except for marmosets), corresponding to the claws in other tetrapod animals. Fingernails and toenails are made of a tough rigid protein called alpha-keratin, a polymer also found in the claws, hooves, and horns of vertebrates.
Structure