As hair are arranged

Far in the past that time when Romans sold at half price bald slaves. From the aesthetic point of view we any more do not give that importance to an abundance of hair on a head which was given to it by our ancestors. However to lose hair and presently it is the extremely unpleasant. Anything so does not irritate, as plesh, especially premature and who does not try to hide the age and how many men are in this question women.

But the abundance of hair on a head for the fair sex always will be the purpose of the most passionate desires and a subject of especial care; hair on a head were, is and will be one of the most important ornaments of female beauty.

Therefore do not lose hair: time having lost, it will be difficult to find then them again. To be convinced of it, look at turns bald, decorating itself public addressing to doctors. They have already tried all hvalenye means again to cover with hair the bared skulls.

If you want to look for the true reason of this passionate desire to have hair will find it not only in a fashion and desire to like, but in requirement of the nature most inherent in the person. First, hair not only a head ornament, but also a force and health sign, protective means against external influences: blows, a cold, a heat, the humidity, in general harmful influence of atmospheric and meteorological changes.

Hair surprisingly soak up a moisture. It is curious, that on this hygroscopic property of hair the French physicist Sossjurom had been constructed in due time though and not exact, but very sensitive hygrometer. Doctors of the last century, for example, saw communication of the constant headaches, a cold not giving in to any treatment with baldness and registered the patient... To carry a wig.

Hair is the most fast-growing body of a body. Each hair consists of two parts: a core, outstanding over a skin, and a root hidden in a hair sack from which hair grows. The hair sack represents the cylindrical deepening similar to a finger of a glove. At the bottom of this deepening lays utolshchennaja a root part — a bulb. From below into a bulb enters connecting sosochek, weaved of the smallest blood vessels — capillaries. From them the nutrients necessary for reproduction of cages of a bulb arrive, hair whence grows. Hair sosochek and a hair sack are braided with the numerous nervous terminations. Blood vessels and the nervous terminations carry out communication of hair with all organism.

In process of growth of hair rises upwards, its cages orogovevajut, istonchajutsja, dry up. The hair part over a skin is not connected not so with nerves, therefore at shaving and a hairstyle we do not feel a pain. Each hair consists of horn substance, therefore it is very strong. Under a microscope in a longitudinal section three layers are well visible: the external consists of the horn petals reminding scales of fish, they form a thin cover of hair, shine and a hair fortress depends on its fortress and safety. The second layer korkovyj, it forms the main weight of hair, in it there is a pigment defining colour. The third layer — a core — a brain layer.
The quantity of hair on a head at the person fluctuates from 50 000 to 140 000. Red hair — the thickest and small. At blondes hair thin, number to 140 000. Black hair on a head nearby 100 000. Each hair lives from 3—4 months (eyelash) till 3—4 years (hair on a head). After hair drops out, sosochek some months have a rest, and then new hair grows from it. For a day hair grow on 0,2—0,4 mm. Also can reach length of 1 1,5 m.