Final answer:
Sebaceous glands produce sebum, an oily substance that waterproofs and moisturizes skin and hair, with antibacterial properties. Sweat glands produce sweat, which aids in temperature regulation and waste excretion.
Step-by-step explanation:
Sebaceous Glands and Sweat Glands
The skin contains specialized glands that serve distinct roles. The sebaceous glands are exocrine glands found throughout the skin, except on the palms and soles, where hair does not grow. They produce sebum, a thick, fatty substance that contributes to waterproofing and moisturizing the hair and skin. Sebum's composition also prevents the growth of certain microorganisms on the skin due to its antibacterial properties. During puberty, the production of sebum is stimulated by hormones, leading to the glands' increased activity.
Sweat glands have a different function as they produce sweat, a fluid consisting of water, salts, and metabolic waste. By sweating, the body not only regulates its temperature through evaporative cooling but also excretes small amounts of waste. Sweat travels through ducts and exits through pores in the skin surface, and while it helps with cooling, sebum provides lubrication and protection against dryness and bacteria.