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

The primary function of sebaceous glands in the skin is to produce sebum, an oily substance that helps lubricate and protect the skin and hair. This oily secretion plays a crucial role in maintaining skin hydration and preventing dryness, which can lead to irritation and other skin issues. Sebum also contributes to the skin's barrier function, helping to protect against external factors such as bacteria and environmental irritants.

While other options relate to functions of different skin structures or systems, they do not accurately describe the role of sebaceous glands. For instance, providing structure to the skin relates more to collagen and connective tissue. The production of sweat is the function of sweat glands, while protection against UV rays is primarily managed by melanin and other protective factors within the skin layers. Thus, the correct understanding of sebaceous glands emphasizes their role in lubrication and overall skin health.