Sebaceous glands

Definition

Sebaceous glands are small oil-producing glands present in the skin. They secrete sebum, which lubricates and waterproofs the skin and hair.

5 Must Know Facts For Your Next Test

1. Sebaceous glands are most densely located on the face and scalp but are found throughout all areas of the skin except the palms and soles.
2. The primary secretion of sebaceous glands is sebum, a mixture of lipids that helps maintain skin hydration and barrier function.
3. Overactivity or blockage of sebaceous glands can lead to conditions such as acne, characterized by inflammation and infection.
4. Sebum has antimicrobial properties that play a role in protecting against certain pathogens and maintaining normal skin microbiota.
5. Hormonal changes, particularly during puberty, can significantly affect the activity of sebaceous glands.

Review Questions

• What is the primary function of sebum secreted by sebaceous glands?
• Which areas of the body lack sebaceous glands?
• How do hormonal changes influence sebaceous gland activity?

Related terms

Acne: A common skin condition resulting from blocked or inflamed sebaceous glands.

Sebum: An oily substance secreted by sebaceous glands to lubricate and protect the skin.

Microbiota: The community of microorganisms living on body surfaces including skin, contributing to health and disease prevention.