What are the physiological functions of the skin

Skin not only covers the entire body, it also has a number of physiological functions, including protection, feel, regulating body temperature, secretion and excretion, absorption, metabolism, immune functions. Are presented below:

First, the protective effect: the external skin to chemicals, microorganisms, rays, external forces (friction, oppression) it to resist the role of in vitro and in vivo can prevent the loss of water and electrolytes, but also to prevent bacteria, fungi and other microbial invasion, an important barrier, but the children of thin skin, easy loss, sebum secretion of small, poor barrier, often because of minor injury to outside. If inappropriate care, it is easy to skin infections caused by local and systemic disease.
Second, I feel the role: perceived sense of touch, pressure, thermal, pain and itch, but the younger, poorer sensory function of skin, especially the newborn even worse, so easily crushed improper care, scald.
Third, the role of regulating body temperature: thermal conductivity of the skin is a bad body, secretion of sweat glands can be cooling, not development of sweat glands in children, even in the hot season, often small or non-Khan Khan, easy to heat. Since the regulatory function of temperature is still not perfect, at room temperature, clothing, bedding how much the temperature can affect the children. In particular, too much wrapped the newborn can increase body temperature, open the package, you can make the temperature drop.
Fourth, the absorption feature: Although the skin barrier can have a role, but the children of the table thin skin, blood vessels, and has a high capacity to absorb and through, so the concentration of pediatric drug use is lower, fewer, not partial packet.
Fifth, secretion and excretion function of sebaceous gland secretion in children and adolescent strong, so often have the material from children, infant milk can see thick, yellow crust; adolescent acne often.
All in all physiological functions of the skin in children and adults, as the body plays a very important role. Growth in children with age, the skin will gradually improve physiological function, which requires more children to care for the skin, its functions in order to avoid imperfections caused by a variety of local and internal organs related diseases.