List Of Structure Of Hair Ideas. Web hair, in mammals, the characteristic threadlike outgrowths of the outer layer of the skin (epidermis) that form an animal’s coat, or pelage. The histological arrangement of the follicle is divided into outer and inner root sheaths.

Above the insertion of the arrector pili muscle, sebaceous glands and. Web those layers are: Depending on the type of hair, the medulla isn’t always present.