What is the primary function of the sebaceous glands in the skin?

The primary function of the sebaceous glands in the skin is to produce oil, known as sebum. Sebum plays a crucial role in maintaining the health and integrity of the skin and hair. It helps to keep the skin moisturized, prevents dryness, and provides a barrier against external environmental factors such as bacteria and pollutants. Additionally, the oily nature of sebum contributes to the shiny appearance of healthy skin and can also enhance the skin's elasticity.

While sweat glands are responsible for producing sweat to help regulate body temperature, sebaceous glands specifically focus on oil production. Temperature regulation is typically managed by sweat evaporation, not oil. Similarly, protection from UV rays is primarily the function of melanin, the pigment found in the epidermis, and not related to the oil produced by sebaceous glands. Thus, the production of oil is fundamental to the skin's overall health and function.