What type of secretion do sebaceous glands produce?

Sebaceous glands produce holocrine secretions, which involve the entire secretory cell disintegrating to release its contents. This type of secretion is unique to certain glands, including sebaceous glands, where the oily substance known as sebum is produced. Sebum plays an essential role in lubricating and waterproofing the skin and hair, helping to prevent dryness and protect against microbial invasion.

Aqueous secretions refer to watery fluids, which are not characteristic of sebaceous glands. Serous secretions are typically thin and watery, produced by glands such as sweat glands, and do not reflect the oily nature of sebum. Mucous secretions, on the other hand, are thick and viscous, primarily produced by mucous glands in the respiratory and gastrointestinal tracts, which again is different from the lipid-rich secretion produced by sebaceous glands. Therefore, the classification of sebaceous gland secretion as holocrine accurately describes the method and composition of the secretion produced.