1-3-1.Function and structure of hair gland
	Role ●The sebum is fat that is secreted from the hair gland, and comes out along the hair. The sebum that went out to epidermis makes the sweat with the mixture sebum membrane. The sebum membrane gives enriching to the skin and the hair, and does the role defended from stimulation from the outside. Moreover, breeding of a harmful bacterium is controlled by doing working kept acidulous for the skin or less to incline at the alkali and to cause neither eczema nor Cabre.
	Structure ●The mouth of the excretion tube opens to hair follicle (cylindrical part where the hair is wrapped) as for sebaceous gland, and the sebum goes out to epidermis along the hair. The bottom in the tube is a round state of the nest, and the sebum is made in the resin gland cell. Finality tears the cell and is secreted from the excretion tube. Therefore, not only the lipid but also the protein and Scaren, etc. are included in the sebum, remains and the cell film where the cell breaks in addition are included, and the one that keratinization was done is included.
	Secretion ●It is distributed in the place along the center of surroundings of the head, the face, and the nose, chests, and the backs a lot though the sebum gland is secreted in the whole body. The secretion of the sebum is controlled by food at the race, sex, the age, and the season. It is not on the back side of the hand and the foot without hairs because the sebum gland is connected with the follicle of pile.