What is the primary function of sebaceous glands?

The primary function of sebaceous glands is to secrete sebum, an oily substance that helps to moisturize and protect the skin and hair. Sebum plays a crucial role in maintaining the skin's barrier function, keeping it hydrated, and preventing excessive water loss. It also has antibacterial properties that help to reduce the risk of infections and acne. By secreting sebum, these glands contribute to the overall health and integrity of the skin, making their role essential in esthetics and skin care practices.

The other choices do not accurately represent the primary function of sebaceous glands. Cooling the skin is primarily the role of sweat glands, while the production of hormones is associated with different endocrine glands. Sensory perception is linked with nerve endings rather than sebaceous activity, thus highlighting the specific and critical function that sebaceous glands have in skin health and aesthetics.