human skin is one of the largest organs in the body, which has its anatomy and physiology, and a 5% by weight of a person.Structure and function of the skin is quite complex.It consists of several layers: epidermis, dermis (skin), and adipose tissue, and each of them has in its structure as several layers.
Thus, the epidermis has five of them:
- primary (embryonic) - produces melanin, due to which the skin can acquire different shades.Thus, what it is, the darker the human skin.In addition, the proliferation of cells is going on here.
- styloid.Through processes of cells that make up this layer, lymph flows, nourishing the cells and deducing the decay products.
- Grainy - contains keratohyalin.On the soles and palms, he has five rows of cells.
- Transparent - contains eleidin and consists of three layers of cells.It is developed on the soles and palms, but there are not lips.
- Exterior (horn) - contains keratin, which helps to maintain the moisture level of skin cells here can easily peel off.Moreover, this layer is sufficiently dense and resilient, it protects the skin from mechanical and chemical influences such as injuries, colds, burns, and other things.
Considering the structure and function of the skin, not to mention the very dermis.It has two layers:
- papillary layer - contains subtle and delicate fibers.
- Net - contains sebaceous and sweat glands, are gathered in the fiber bundles, the elasticity of their skin depends on a property, such as elasticity.
Next, consider the structure and function of the skin, such as subcutaneous fat.
Adipose tissue is the deepest sloёm.It consists of a grid with slices of fatty tissue that provides thermal regulation of the whole organism, and it is protected from injuries.There are large vessels and nerves and muscles and sebaceous gland.It is interesting that the female is slightly thicker layer than in men.Very little it is expressed on the lips and ears.
The skin structure and functions which are rather complicated, the network has two vessels:
- Network, located on the border of the dermis and fat.
- chain located between the papillary and reticular layers.
From the location of these vessels depends on skin color.What they are closer to the surface, the more pronounced glow.
It should be noted that the structure of the skin on different parts of the body is different.Dense and rough is on the soles and palms, it is on the body elastic.The most delicate skin on your face is the person.The structure of the skin is caused by interweaving it in striated muscle, so she and mobile.
Functions of the skin are quite varied:
- protective function - protection of the body from the effects of external factors, including mechanical and radioactive.Also one of the properties of the skin is protection from microorganisms.These functions provide the epidermis (stratum corneum) and fatty tissue.
- absorption function of skin- ability to absorb some gas, water and fat-soluble substances.This feature allows the horny layer of the epidermis.
- excretory function - carried out by the sebaceous and sweat glands under the control of the nervous system.How well are allocated substances through the skin it depends on the age and human nutrition as well as environmental influences.
- thermoregulation - the body's ability to maintain a certain constant temperature of the body.This process is carried out at 80% through the skin.
- participation in metabolic processes - in the skin is water exchange, and the exchange of proteins, fats, carbohydrates, vitamins and salts.
examined the structure and function of the skin, it can be concluded that it is an indispensable organ of the human body involved in its development and functioning.
