Subcutaneous layer: it has under dermis. It consists predominantly of fat. Here predominant fat cel

Human skin is remarkable. It is the largest organ in the human body, but unfortunately it is often taken for granted. Many people do not pay attention to their skin until they appear wrinkles, rashes, excessive dryness or oiliness.
Between 2 and 3 billion skin cells were removed daily. The body of a man devoted to this process so many materials and energy, as the skin is the first line of protection against dehydration, infections, injuries and temperature shocks. Skin cells have detoxicating function, like liver cells. Healthy skin surface prevents the entry of infectious agents into the bloodstream. In the skin can not be absorbed by the various ingredients topically applied creams and lotions.
The skin is composed of the following layers: Epidermis: performs the barrier function. It has 12-15 cell layers and has a thickness 0.07 to 0.12 mm (the thickness of the sheet of paper). It is mainly tattoo shops composed of dead cells that are constantly sloughed tattoo shops and replaced by new cells from the lower layers. At the base of the epidermis to have viable cells, which continuously grow and divide. Over time, they move about the surface, change shape and function, a process called differentiation.
Derma: fattest skin layer and consists of a network tattoo shops of collagen tattoo shops and elastin fibers. Collagen and elastin are essential proteins: collagen has a supporting tattoo shops role, and elastin is responsible for skin elasticity. This predominate layer cells called fibroblasts that synthesize tattoo shops collagen, elastin and other structural elements. tattoo shops The normal functioning of the fibroblasts is very important to the overall tattoo shops health tattoo shops of the skin. The dermis is located capillaries (small blood vessels) and lymph nodes (depot of immune cells). The first are of importance for the supply of oxygen and nutrition to the skin and the latter, for protecting it from the entry of microorganisms. In the dermis there are: the so-called. skin appendages: sebaceous glands, sweat glands, hair follicles, and a small number of nerve and muscle tattoo shops cells. The dermis is responsible for the integrity of the skin elasticity and flexibility. Wrinkles are formed tattoo shops in this layer.
Subcutaneous layer: it has under dermis. It consists predominantly of fat. Here predominant fat cells. Subcutaneous fat has insulating function and protects against mechanical injury. Most mammals are not fat, as they fulfill the above coat functions. Sweat glands derive from that layer. Loss of subcutaneous tissue appears tattoo shops with age and results in sagging of the skin.
What features has the skin? Sensory: has receptors for heat, cold, touch, pressure, vibration, pain. Thermostat: helps maintain a constant body temperature. Synthesis: formation of vitamin D in the skin. Upon exposure to the sun's ultraviolet rays are absorbed, which are required for the synthesis. Vitamin D is needed to absorb calcium, which is an important element for the bones. Melanin pigments determining skin color. It absorbs harmful ultraviolet rays. Protective: from mechanical injury. Barrier: healthy skin acts as a barrier against external agents (bacteria, fungi, viruses, chemicals, etc.). Immune: it contains cells with immunological functions.
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