Added: 12/25/2005 |
Skin 3 main portions description.Today it is proved that skin is the biggest human?s organ that weights about 11kg.The skin represents complex system that provides a great deal of vitally important functions such as strong protection from bad environmental influence, sun rays and UV radiation impact; water control function and others. As any other system in the universe this one consists of some elements.
The human?s skin 3 main portions are subcutaneous layer, epidermis and dermis. At the moment it is obvious that skin functions not only for shape and appearance forming. It is proved that if the big area of the skin is seriously damaged the life is under danger and the human will probably not survive as water and infection control will be lost. It is easy to determine three principal functions of epidermis: environment protection (today it is very important because of harmful sun and UV-radiation effects); water control, infection protection (the skin serves as special cover that prevents penetrating of all kinds of infection), temperature regulation.
Sun rays bring to the Earth big quantity of light and heat (sometimes even more than it is necessary). Although without these elements no life is possible their influence can turn out to be very harmful. The bad impact of UV-radiation is solved with two elements: stratum of the skin reflects it; part of this energy is absorbed by melanin of epidermal layer. Body water loss prevention is very important as water is essential part of the human?s organism; it forms 70-75% of the body. Water control runs through the process of evaporation through the epidermis (as well as dermis).
Epidermis can be characterized as the external skin layer; on of the skin 3 main portions. Its thickness depends on the skin type. In the case of eyelids it is the thinnest (0.5mm); as for soles and palms here it is the thickest (up to 1.5mm). This layer can be subdivided into 5 layers (basale, spinosum, granulosum, licidum, corneum). Epidermis is represented by three kinds of cells (melancocyte, Langerhans?, Merkel?s). Epidermis and dermis functions are very important.
The next one skin layer form the skin 3 main portions is dermis. The situation with its thickness is similar with epidermis? one. It is combined by 3 different tissues (collagen, elastic and reticular fibers). This skin portion includes a lot of special cells and unique structures. It even keeps blood vessels and numerous glands such as eccrine and apocerine.
Subcutaneous layer is the last one from the skin 3 main portions. It is a tissue formed of fat and connective cell layer that are rich in blood vessels and nerves. This skin portion?s main function is skin and body temperature regulation. Subcutaneous layer size depends on individual peculiarities.
Thus it is clear that skin functions work is influenced by many factors and first of all its components condition which in their turn will determine human?s health state.
There are many factors that influence the skin much and are uncontrolled for the human. But everyone should be very careful with household remedies that can damage the skin.
Article comments:
No comments for this article yet. Post your comment now!
