The composition of the hair
Hair can be distinguished on the following parts:a. Head: pointed to the hair that was never cut.b. Batabg hair: the hair that are on the surface of the skin.c. Root of the hair: the hair that is embedded in the skin.Oblique hair follicles embedded in the skin, bladder veiled by hair (the hair follicle). head hair roots are embedded very deep and can reach the hypodermis, while chilling roots only until the top layer of the cuticle.
The composition of the substances horn hair shaft and the hair root is no different. Only the deepest roots of the widened part, berwarnake are white vaginal discharge and still soft, is different from the upper parts and is known as the hair bulbs. Cells containing parakeratin, a precursor substance keratin (horn substances). hair bulb cells are germ cells that continually multiply. The cells of the newly formed cells push the older upward. Selrambut cells are pushed upwards will experience the process pertandukan (keratinization). In addition to the stem cells had been in the hair bulb melanocytes are also useful for perbentukan pigment melanin.
On the base of the hair bulb there is a basin. In this basin there is a lump of connective tissue with blood vessels and lymph smooth, as well as fibers for feeding the hair bulbs and hair for bladder innervation.In the cross-section of the hair shaft turns, that hair is composed of three parts which are arranged in concentric.
1. Hair membrane (cutikula): composed of cells flattened horn arranged like fish scales, which is underneath the top cover. The arrangement thus enables the achievement of the desired results of penyasakan hair, because hair membrane scales one involves the adjacent scales. Penyasakan hair too often meragangkan relationship hair cell membrane, membrane damage hair, so that the liquid more easily into the hair.
2. Hair Skin (cortex): composed of cells of horn-shaped coils arranged lengthwise and containing grains of melanin. Horn cells composed of keratin fibers, which are arranged lengthwise. Each fibers (fibrils) is an option keratin molecules such as rope. Keratin molecules are in a spiral shape and between molecules was found ties that maintain the shape of the hair. In connection with the then:
- Hair can be moved;
- By releasing the bonds between the molecules of the horn,
then roll the hair in the desired shape and finally reconnect the bonds are released, the hair can be transformed regularly (curling).
3. hair marrow (medulla): in the form of the central part of the hair that is formed by a woven tangible horn substance with cavities berrisikan air.Penampangan transverse straight hair round or ellipse (oval), while the wavy hair horns distribution of substances in the cortex thickened on one side. Curly hair penempang sectional erratic (sometimes kidney-shaped).
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