What is the primary function of sweat glands?

The primary function of sweat glands is to help cool the body through perspiration. When the body's temperature rises, the sweat glands produce sweat, which is primarily composed of water, salts, and small amounts of other substances. As sweat evaporates from the skin's surface, it effectively dissipates heat, helping to lower the body temperature. This mechanism of thermoregulation is crucial for maintaining homeostasis, especially during physical activity or in hot environments.

Other functions of the integumentary system include slight roles in excretion and the maintenance of skin hydration, but the cooling effect through sweating is the most significant and well-known purpose of sweat glands, particularly in regulating body temperature and preventing overheating.