Question

Nails are made up of hardened skin called​

Answer 1

Answer:

keratin

Fingernails grow from the matrix. The nails are composed largely of keratin, a hardened protein (that is also in skin and hair). As new cells grow in the matrix, the older cells are pushed out, compacted and take on the familiar flattened, hardened form of the fingernail.

Answer 2

Answer:

Nails themselves are made of keratin (say: KAIR-uh-tin).

This is the same substance your body uses to create hair and the top layer of your skin.

You had fingernails and toenails before you were even born.

Explanation:

Fingernails grow from the matrix. The nails are composed largely of keratin, a hardened protein (that is also in skin and hair). As new cells grow in the matrix, the older cells are pushed out, compacted and take on the familiar flattened, hardened form of the fingernail.

The skin on top of your nail called a thin layer of skin, known as the cuticle, grows over the nail there.