What role do sebaceous glands play in skin physiology?

Sebaceous glands are integral to skin physiology primarily because they are responsible for secreting oil, also known as sebum. This oily substance plays a crucial role in maintaining healthy skin by providing lubrication, which helps to keep the skin and hair moisturized and prevents dryness. Additionally, sebum contains antibacterial properties that can help protect the skin from infections and environmental damage.

The secretion of oil by sebaceous glands also contributes to the barrier function of the skin, preventing the loss of moisture and creating a protective layer against pathogens. The oil helps to keep the skin supple, which is vital for its elasticity and overall health. Thus, the function of sebaceous glands is essential for maintaining the skin's integrity and moisture balance, making their role in secreting oil highly significant in skin physiology.