PATHOLOGY

Detailed explanation-1: -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.

Detailed explanation-2: -Background: Keratin, an alpha-helical fibrous protein, is the primary component of human nail plates. No data on age-related changes in healthy subjects are present.

Detailed explanation-3: -Nail plates contain 80–90% hard keratins and the remaining part is soft. The -keratins are also primary constituents of hair and the stratum corneum of skin.