What is the primary function of sebaceous glands?

The primary function of sebaceous glands is to secrete oil, known as sebum, which lubricates and protects the skin and hair. Sebum helps to maintain skin hydration by preventing moisture loss, thus ensuring that the skin remains supple and resilient. It also plays a role in protecting the skin from external factors such as bacteria and environmental pollutants due to its antibacterial properties.

While regulating body temperature is essential for maintaining homeostasis, this is primarily the role of sweat glands, not sebaceous glands. Similarly, the production of sweat is directly related to the activity of sweat glands, which help cool the body through perspiration. Absorption of UV radiation is more associated with the skin's pigmentation and the outer layers, rather than the function of sebaceous glands specifically. Therefore, the correct understanding of sebaceous glands is fundamental to their role in skin health and maintenance.