What is the primary function of sebaceous glands?

The primary function of sebaceous glands is to produce sebum, an oily substance that helps to keep the skin and hair moisturized. Sebum is secreted into hair follicles and spreads across the skin's surface, providing a protective barrier that helps to prevent dehydration and protects the skin from external irritants and pathogens. Additionally, sebum has antimicrobial properties, which can help reduce the risk of infections.

While controlling body temperature, protecting against pathogens, and facilitating sensory perception are essential functions of other skin structures and systems, they do not directly relate to the primary role of sebaceous glands. The key focus on sebum production highlights its importance in maintaining skin health and overall homeostasis.