Final answer:
Sebaceous glands are holocrine glands in the dermis that produce sebum to lubricate the skin and hair, offering also antibacterial protection. Sweat glands contribute to temperature control and waste excretion. Both types of glands are exocrine, releasing secretions to the skin surface, and require regular cleaning to prevent blockages like pimples.
Step-by-step explanation:
The sebaceous glands are vital components of the human skin. They are holocrine glands found in the dermis layer and are responsible for the production of an oily substance known as sebum. Sebum plays a critical role in lubricating and waterproofing both the skin and hair, while also providing antibacterial properties that protect against microorganism growth on the skin. The glands are especially active after puberty due to hormonal stimulation. Sebaceous glands are often associated with hair follicles, where they secrete sebum directly.
On the other hand, sweat glands are involved in thermoregulation and waste excretion by producing and releasing sweat through pores on the skin's surface. In addition to temperature control, the evaporation of sweat from the skin helps to eliminate excess water and salts from the body.
Both sebaceous and sweat glands are examples of exocrine glands, which release their secretions through ducts to nearby body surfaces. When the ducts of these glands become blocked or infected, conditions such as pimples can occur, which are more common during adolescence. Regular cleaning can help manage the secretion of sebum and prevent blockages, thereby reducing the occurrence of acne and maintaining skin health.