What is the primary function of sweat glands?

The primary function of sweat glands is to cool the body down and excrete waste. When the body temperature rises due to external heat or physical exertion, the sweat glands produce sweat, which evaporates from the skin's surface. This evaporation process helps to lower the body's temperature, a critical mechanism for thermoregulation.

Additionally, sweat contains water, salts, and small amounts of urea and other waste products. By releasing these substances through sweat, the glands assist in excreting waste from the body, contributing to homeostasis. This dual role of cooling and waste excretion highlights why the function of sweat glands is vital for maintaining overall health and performance during physical activities.