subject: What are the physical characteristics of the hair do? [print this page] Hair from the bottom up can be divided into dermal papilla, hair follicle, hair root and hair shaft four parts. Physical characteristics and function of hair depends primarily on the scalp skin following dermal papilla, hair follicle and sebaceous gland, etc.chi flat iron
Follicles for the hair root part of the dermis layer, the inner root sheath, outer root sheath and hair bulb formed in the inner root sheath and hair hair long post is directly adjacent to the sheath. Inner root sheath is hard straight, thick-walled tube of keratin, which decided when the sectional shape of hair growth. The lower three layers of inner hair sheath: HUXLEY sheath, HENLE sheath and inner root sheath surface. Keratin of the hair before the hair inside the hair root sheath, together with the growth of hair follicles are the source of cells underlying reproduction. Offices near the epidermis, inner hair root sheath and the epidermis and hair follicle disengagement.chi hair straightener
Dermal papilla is the bottom of hair follicles, with a capillary and nerve endings. In the bottom of hair follicles, skin cells constantly divide and differentiate. The epidermal cells of different ways to form different components of the hair (such as the cortex, epidermis and Sebaceous gland function is to secrete sebum, sebum sebum control by extrusion, when the hair tube through the skin fold, away from the extrusion of sebum sebum control. Sebum to provide natural protection for the hair effects, to give hair shine and water resistance.chi flat irons Li Mao muscle is connected to the small muscles of epidermal organs, depending on the external physiological environment, Li Mao muscle can stretch or shrink. Temperature decreases or the role of adrenal hormones, can pull the hair follicles to a higher position, so that Mao Fajian from.
What are the physical characteristics of the hair do?
