Why we sweat?

For it we answers потовая and sebaceous secretion. For maintenance of a constant body temperature return of warmth by a body by a diaphoresis has great value. For preservation of an organism from excessive cooling during cold time dermal capillaries are narrowed, allocation of sweat and heat return thus sharply decrease.

Depends on numerous factors. It can amplify or decrease under the influence of the central or vegetative nervous system, glands of internal secretion, physical work, medical products, etc. usually healthy person allocates daily nearby 0,5 — 2 litres of sweat, however at the strengthened physical strain and during hot time or at some diseases the quantity of allocated sweat can reach 5 and even 10 litres. Sweat contains about 98 % of water, 1 % of Sodium chloridums (table salt) and 1 % of organic substances.

Secretion of sebaceous glands has very important hygienic value. The secret of sebaceous glands consists of water (67 %), organic substances (33 %), neutral Adepses, the higher fat acids, fibers, etc. Quantity of an allocated fatty secret, the same as also the quantity of allocated sweat, is defined by a condition of nervous system (central and vegetative) and glands of the internal secretion accepted by nutrition, etc.

The fatty secret not only promotes greasiness of hair and a skin, facilitating thereby the friction of a dermal surface, but protects a skin from dehydration, drying and cracks, does its softer and elastic. The secret of sebaceous glands admixed with then, forms the thin layer named a water-in-oil mantle on a skin surface. Its value for an organism and specially for a skin is defined not only that it is a bad conductor of heat, but also that. That isolates a skin from harmful influence of heat, chemical and biological (microbes) of stimuluses. That is why the skin with smaller quantity of sebaceous glands or with their more weak functional ability dry, облущивается, becomes inelastic, rough and unstable to numerous external adverse factors (to a cold, a heat, weak acids or the alkalis harmful to microbes, etc.).

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