What is the primary function of sebaceous glands?

Sebaceous glands primarily function to secrete sebum, which is an oily substance that helps to lubricate and protect the skin and hair. Sebum plays a crucial role in maintaining the skin's moisture balance, preventing it from becoming too dry, and providing a barrier against potential pathogens. This secretion also has antimicrobial properties, contributing to the skin's defense mechanism.

While other glands in the body have their specific functions, such as sweat glands that produce sweat for cooling the body, mammary glands that produce milk for nourishment, and various mechanisms involved in temperature regulation, it is the action of sebaceous glands that is specifically focused on the production and secretion of sebum. The overall health of the skin is highly dependent on the proper functioning of these glands, which is vital for maintaining skin integrity and hydration.