Which glands are known for producing oil and are connected to hair follicles?

Sebaceous glands are specialized glands in the skin responsible for producing sebum, an oily substance that lubricates and protects the skin and hair. These glands are typically connected to hair follicles, allowing the sebum to be secreted directly onto the hair and skin surface. This oil helps maintain skin hydration, provides a barrier against pathogens, and contributes to the overall health of the hair, making sebaceous glands critical for the proper functioning of the integumentary system.

Eccrine and apocrine sweat glands are associated primarily with the production of sweat and play different roles in thermoregulation and scent production, respectively. Ceruminous glands, located in the ear canal, produce earwax and do not have a direct connection to hair follicles.