![]() Like all skin, it is made of two types of tissues: the dermis and the epidermis. Nerves and blood vessels found here supply nourishment to the entire nail unit. It is the area of the nail on which the nail plate rests. The nail bed is the skin beneath the nail plate. The lunula appears white due to a reflection of light at the point where the nail matrix and nail bed meet. The lunula can best be seen in the thumb and may not be visible in the little finger. The lunula ("small moon") is the visible part of the matrix, the whitish crescent-shaped base of the visible nail. This makes the capillaries in the nail bed below visible, resulting in a pink color. As new nail plate cells are made, they push older nail plate cells forward and in this way older cells become compressed, flat, and translucent. The matrix will continue to produce cells as long as it receives nutrition and remains in a healthy condition. The width and thickness of the nail plate is determined by the size, length, and thickness of the matrix, while the shape of the fingertip bone determines if the nail plate is flat, arched, or hooked. The matrix produces cells that become the nail plate. It is the part of the nail bed that is beneath the nail and contains nerves, lymph and blood vessels. The nail matrix is also known as the matrix unguis, keratogenous membrane, or onychostroma. ![]() The cells harden as they move outward from the nail root to the nail plate. The nail matrix is the active tissue (or germinal matrix) that generates cells. ![]() The nail consists of the nail plate, the nail matrix and the nail bed below it, and the grooves surrounding it. Fingernails and toenails are made of a tough rigid protein called alpha-keratin, a polymer also found in the claws, hooves and horns of vertebrates. A nail is a protective plate characteristically found at the tip of the digits ( fingers and toes) of all primates, corresponding to the claws in other tetrapod animals.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |