Fingernails and toenails are made of a tough protective protein called alpha-keratin, which is a polymer. Alpha-keratin is found in the hooves, claws and horns of vertebrates.
Nail art is a creative way to paint, decorate, enhance, and embellish nails. It is a type of artwork that can be done on fingernails and toenails, usually after manicures or pedicures.
The skin on your heels is usually thicker than the rest of your body. This makes it more prone to dryness.
A nail is a claw-like plate at the tip of the fingers and toes in most primates.