Sebaceous glands

Definition

Sebaceous glands are small oil-producing glands present in the skin of mammals. They secrete sebum, an oily substance that lubricates and waterproofs the skin and hair.

5 Must Know Facts For Your Next Test

1. Sebaceous glands are typically found in the dermis layer of the skin.
2. These glands are most abundant on the face and scalp but are present throughout all areas of skin except for the palms and soles.
3. Sebum produced by sebaceous glands contains lipids, proteins, and electrolytes.
4. Overactive sebaceous glands can contribute to acne formation due to excess sebum production.
5. The activity of sebaceous glands is regulated by hormones, particularly androgens.

Review Questions

• Where in the skin are sebaceous glands primarily located?
• What is the main function of sebum produced by sebaceous glands?
• How do hormones influence the activity of sebaceous glands?

Related terms

Dermis: The middle layer of skin where blood vessels, nerves, hair follicles, and sweat and sebaceous glands reside.

Sebum: An oily secretion from sebaceous glands that helps protect and lubricate the skin and hair.

Androgens: A group of hormones that play a role in male traits and reproductive activity; they also regulate sebaceous gland activity.