Each for it is on to a small eretor muscle, that its movement allows, and to one or more sebceas glands, that if put in charge of its lubrication. It is constituted by a pavimentoso epitlio estratificado queratinizado that is escamosas cells in some layers. The main cell of its constitution is the queratincito, that produces the queratina. The queratina is responsible a resistant and impermeable protein for the protection. But it presents others as imunitrias cells, mainly cells of Langerhans, giants and with prolongations membranares.
Anatomy of the skin Is finssima and its thickness goes of 004 2 mm. An adult loses daily about 15 grams of epiteliaiais cells, the cells if they renew without stopping, this cycle of life of 21 days. The skin weighs about 4 kilos and it recovers the body, a total area of approximately 2 square meters all. constituting 15% of the corporal weight, covering almost all the genital body to the exception of the genital and alimentary orifices, eyes and mucous surfaces. It recovers it a queratina layer, an impermeable protein that makes it difficult the water exit that has great physiological importance acting with the maintenance of the corporal temperature with its loss for evaporation.
An adult can daily produce of the 2 liters of sweat. The thickness of the skin varies as in eyelids she is finer of what in the coasts. The few ultraviolet rays that obtain to cross the melanina barrier react with definitive epithelial proteins, producing vitamin D. Nests of producing melancitos of melanina, a pigment chestnut that absorbs rays UV), pigment that of the color to the skin. It has some types of responsible receivers for the tteis sensations. It presents corpsculos of Pacini or also known as Vater Pacini; corpsculos of Meissner; records of Merkel; corpsculos of Ruffini; free terminations in the skin and the base of the ones for.