Topic summary
Sebaceous
Extracted from the Wikipedia article Sebaceous gland.
Location
Sebaceous glands are found in hair-covered areas, where they are connected to hair follicles. One or more glands may surround each hair follicle, and the glands themselves are surrounded by arrector pili muscles, forming a pilosebaceous unit. The glands have an acinar structure (like a many-lobed berry), in which multiple glands branch off a central duct. The glands deposit sebum on the hairs and bring it to the skin surface along the hair shaft. The structure, consisting of hair, hair follicles, arrector pili muscles and sebaceous glands, is an epidermal invagination known as a pilosebaceous unit.