MICROANATOMY

Detailed explanation-1: -keratin, fibrous structural protein of hair, nails, horn, hoofs, wool, feathers, and of the epithelial cells in the outermost layers of the skin. Keratin serves important structural and protective functions, particularly in the epithelium.

Detailed explanation-2: -Hair is composed of 95% keratin, a fibrous and helical protein (in the shape of a helix), which is part of the composition of the skin and of all the phanera (hair, nails, etc.). Synthesized by keratinocytes, keratin is insoluble in water, thus ensuring waterproofing and protection for hair.

Detailed explanation-3: -Keratin, like all proteins, is made up of amino acids. Each protein contains its specific order of amino acids, much like each person contains its string of deoxyribonucleic acid (DNA). While keratin can also be found in internal organs and glands, they are primarily found in epithelial cells.

Detailed explanation-4: -(KAYR-uh-tin) A type of protein found on epithelial cells, which line the inside and outside surfaces of the body. Keratins help form the tissues of the hair, nails, and the outer layer of the skin. They are also found on cells in the lining of organs, glands, and other parts of the body.