What is the primary function of sebaceous glands?

The primary function of sebaceous glands is to produce oil, specifically sebum, which is an oily substance that helps to lubricate and protect the skin and hair. Sebum plays a critical role in maintaining skin hydration, preventing dryness, and providing a barrier against harmful microorganisms. It contributes to the overall health and appearance of the skin by ensuring it remains pliable and preventing excessive water loss. This natural oil also has antimicrobial properties that help protect against infections.

In contrast, the other choices refer to different types of glands or functions. Sweat is produced by sweat glands, which help regulate body temperature and cool the body through perspiration. The regulation of body temperature is primarily the role of sweat glands, rather than sebaceous glands. Lastly, filtering waste refers to processes typically associated with the kidneys rather than the skin. Thus, understanding the unique role of sebaceous glands clarifies their importance in skin health and maintenance.