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

The primary function of sebaceous glands in the skin is to secrete an oily substance called sebum, which plays a crucial role in maintaining skin health. Sebum acts as a natural moisturizer, helping to prevent the skin from becoming dry and brittle. It also provides a protective barrier against bacteria and fungi, enhancing the skin's overall health and integrity.

While sebaceous glands are responsible for the secretion of oil, they do not secrete fluid through the skin in the way that sweat glands produce perspiration. The main role of sweat glands is to help regulate body temperature by releasing sweat, which cools the skin upon evaporation. Therefore, the focus on sebaceous gland function highlights their specific contribution to skin lubrication and protection, rather than general fluid secretion or temperature regulation.