头发知识——呀诺达植物育发馆（Hair - hair knowledge yanoda plant museum）.docVIP

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头发知识——呀诺达植物育发馆（Hair - hair knowledge yanoda plant museum）.doc

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头发知识——呀诺达植物育发馆（Hair - hair knowledge yanoda plant museum）

头发知识——呀诺达植物育发馆（Hair - hair knowledge yanoda plant museum） Hair basics: First, the concept of hair: Hair is the hair that grows above the head and back of the head. Function: to increase peoples sense of beauty, protect the brain, help the body fluid evaporation, regulate body temperature, identify blood type, trace elements, DNA identification and so on. Two, the structure of hair: Hair from dry hair, hair roots, hair follicles (hair papilla) composition. A part of the skin is dry; in the skin below is the root; soft tissue wrapped roots called the hair follicle, opening funnel-shaped spiral is on the scalp; hair follicle dermal papilla: the bottom connecting capillaries and nerve endings, provide nutrients equivalent to the nutrient solution for hair follicle; hair matrix is the hair and the hair follicle growth zone the equivalent of the land; melanin is located in the middle of the hair follicle and hair papilla hair matrix; What we can see is dry, dry, transverse, and the hair is divided into three layers from the inside to the outside. (here to draw the hair cross section) called Mao Xiaopi: the outermost layer of the outermost layer of the hair, with keratinizing squamous cells showed imbricate arrangement, about 6 - 10 layer, electron microscope as well as see scaly; smooth and neat, it decided to protect hair hair lock water, damaged, water lost. Hair simply, not bright, split ends. The middle layer is the main component of hair: hair cortex, had a close relationship with the hair color, elasticity and strength (containing melanin granules, which is from the birth to hair follicles), hair cortex is straight, curly hair appearance determines, depending on the arrangement direction of the cortical cell. The innermost layer is called the hair medulla: located in the center of the hair, the cells contain melanin particles, it is the presence of melanin particles, so that the hair color. The relationship between the sebaceous glands and hair structure: sebaceous