what does a fingernail consist of?
<answer> Fingernails are made of a tough protective protein called alpha-keratin. <context> A nail is a horn-like envelope covering the tips of the fingers and toes in most primates and a few other mammals. Nails are similar to claws in other animals. Fingernails and toenails are made of a tough protective protein called alpha-keratin. This protein is also found in the hooves and horns of different animals.