Parts of two hairs embedded in their follicles. Labels: a, the skin, which is seen to dip down and line the follicle; b, the subcutaneous tissue; c, the muscles of the hair follicle, which by their contraction can erect the hair; o, sebaceous gland.

Hairs and their Follicles

Parts of two hairs embedded in their follicles. Labels: a, the skin, which is seen to dip down and line…

Section of scalp, showing longitudinally cut hair follicles.

Scalp Showing Hair Follicles

Section of scalp, showing longitudinally cut hair follicles.

Sebaceous gland from the human skin.

Sebaceous Gland from Human Skin

Sebaceous gland from the human skin.

Section of the skin showing the hairs and sebaceous glands. The sebaceous glands are small saccular glands, the ducts of which open into the hair follicles. They are lined with epithelium and secrete a fatty, oily substance which they discharge into the hair follicles to lubricate the hairs and make them glossy. It also exudes over the surface of the skin to keep it soft and flexible. Labels: a, the epidermis; b, corium; c, muscles, attached to hair follicles and to under surface of epidermis.

Section of Skin Showing Hairs and Sebaceous Glands

Section of the skin showing the hairs and sebaceous glands. The sebaceous glands are small saccular…

Vertical section of the skin, showing sebaceous glands, sweat-glands, hair, and follicle, also arrector muscle.

Vertical Section of the Skin

Vertical section of the skin, showing sebaceous glands, sweat-glands, hair, and follicle, also arrector…