Skin care - skin (epidermis) and inner layer (dermis)

STRUCTURE

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To provide the best care of your skin, it is important to understand its formation. The skin is made ​​of three layers: the epidermis, the outermost layer that you see and touch the dermis, the inner layer, where the work takes place, and the subcutaneous fat, the skin separates from the rest of the tissue in the body.

Skin (epidermis)

Two main layers are the epidermis - the stratum corneum (outermost layer, and hard surface)and the Malpighian layer. The cells that make up most of the epidermis (95 percent) are called keratinocytes, because they produce keratin - a protein amino acids (the building blocks of most living things) together in a dense configuration of a crowded "Alpha-Helix" .

Keratin gives the skin its strength and made remarkable not only the surface layer of the skin, but hair, nails, feet - nails, hair, horns, hooves and feathers. That 's what keeps the skin waterproof.

L 'other epidermal cells, the melanocytes, the melanin that produces the color of the skin. (White skin and black skin does not differ in the number of melanocytes. Skin is darker than black part because its most melanocytes synthesize melanin in white leather.)

Melanocytes are in the Malpighian layer, where the miracle takes place on the skin and reproductive exchange. shares underlying this basal cell layer consistently - about once every hour - to form new cells. It takesto come about two weeks for the entire process - from the birth of the cells and moving through the Malpighian layer to cell death and surfaces in the outer layer, the stratum corneum. A layer of new skin is formed about every 28 days. Even as you read this, skin cells will die and be replaced.

The inner layer (dermis)

The layer of connective tissue is known as the dermis immediately beneath the epidermis. The dermal connective tissuecalled fibroblasts, fibrous protein compound (collagen, elastin, and reticulum) in cells and a material called ground substance. Besides appearing fibroblasts, other cells, sometimes in the dermis, most of which include the migration from the blood of foreign materials and fight infection. Collagen, the most common is responsible for the mechanical strength of the skin.

The matrix is ​​a composition of water and a variety of chemicals, forms a matrix in whichAll other components are integrated into the skin and occur through which the transfer of substances between cells.

Unlike the epidermis, the dermis contains blood vessels, with nutrients and oxygen and remove metabolic waste. The dermis also contains lymph vessels and nerves, as well as specialized structures called skin appendages: sweat glands, sebaceous glands (oil) and hair follicles.

Skin care - skin (epidermis) and inner layer (dermis)