What role do sebaceous glands play in skin health?

Sebaceous glands are essential for maintaining skin health primarily because they secrete oils, known as sebum, which play a critical role in lubricating the skin. This oily secretion provides a protective barrier that helps to keep the skin hydrated and prevents it from becoming dry and flaky. By maintaining moisture levels on the skin's surface, sebum also contributes to the skin's elasticity and overall appearance.

In addition to lubrication, the components within sebum have antimicrobial properties that can help reduce the risk of bacterial growth on the skin, thus indirectly contributing to skin health. However, the primary function of these glands is the secretion of oils, making option C the most accurate choice.

Other functions mentioned in the available options, such as producing moisture or sweat, are carried out by different structures in the integumentary system; for instance, sweat glands are responsible for perspiration. While certain aspects of skin health may involve fighting infections, this is not the direct role of sebaceous glands, further clarifying why the correct choice centers on their oil secretion function.