skin covers the outside of the human body, it protects all the internal organs from external influences (friction, pressure, shock, rupture).Furthermore, different cover prevents penetration of bacteria into the organism.Its thickness in different areas varies from 0.5 to 4 millimeters approximate weight of 3 kg.
structure of the skin allows it to participate in exchanges, secretory and protective processes, as well as the body thermoregulation (regulation of temperature).Throughout the day stands out through cover approximately 500 milliliters of water.This represents 1% of the total body.The structure of the skin involves removal of metabolic products of protein and various salts.Cover absorbs oxygen, releasing carbon dioxide.Mineral, water, and gas exchange cover in intensity only slightly inferior to the intensity of metabolism in muscle and liver.
structure of human skin allows for alarm function - it is provided arranged in all its layers sensitive receptors in large amounts.With the help of these people are able to perceive pain, pressure, heat, touch.The structure allows the skin located on separate sites in Q1.cm. and twelve of cold, pain of two hundred, two and twenty-five thermal pressure sensitive endings.It should be noted that the presence of the sensitivity of the important tasks on the interaction of organism and environment, prevents burns, wounds, frostbite.
skin.Structure.
normal functioning of the body is ensured by constant conditions of existence.External factors quite volatile and have a permanent effect on the man.Ensuring and maintaining the integrity of the whole body lying on the outer covering of the body.The structure of the skin is quite difficult.This body comprises three layers.
The topmost is the epidermis.It has a thickness of from 0.03 to 1.5 millimeters and more (for example, on the palms or soles).It, in turn, consists of five layers.The surface layer (cornea) is presented on dead horny cells tightly packed together.Constantly is their office and replaced by new cells.It performs the function of protecting the epidermis.It is he who prevents the influence of external factors on the body.Due to its structure the epidermis has elasticity, strength and elasticity.In addition, it is able to recover rapidly enough for minor injuries.Each of the five layers matures into one another, so there is a constant update.Fully updated for the cells 26-28 days.They are all of the cells of the skin are able to multiply and grow at such a rate.
outdoor polkrova next layer - the dermis - is represented by intertwined fibers.The main ones are collagen and elastin (collagen and elastin are the basic structural skin proteins).Due to their cover is resilient, able to recover its original shape after stretching.In the dermis are two layers.The lymphatic and blood vessels, muscles, nerves, sebaceous and sweat glands, hair pass through the deep layer.
Under the dermis is the subcutaneous fat (hypodermis).This layer is a kind of "cushion".Its thickness varies depending on the body part.This is caused by a rounded shape of the body.Hypodermis protects the body from hypothermia, injuries, external stimuli, is accumulating a layer which are deposited fat reserves consumables illness, pregnancy, hunger.
Virtually every part of the skin sweat glands are located.Most of them on the balls of the toes and hands, soles, palms, inguinal and axillary folds.These glands are involved in the secretory function.
Sebum - secretion produced by sebaceous glands.It makes the skin supple, softens it.
