Sweat glands are small tubular structures in the skin that produce sweat, a fluid primarily composed of water, salts, and waste products. They play a crucial role in regulating body temperature through the process of evaporation. There are two main types of sweat glands: eccrine glands, which are found all over the body and help cool the skin, and apocrine glands, located mainly in areas like the armpits and groin, which become active during puberty. When the body heats up, the nervous system signals the sweat glands to release sweat onto the skin's surface. As the sweat evaporates, it cools the body down. This process is essential for maintaining a stable internal temperature, especially during physical activity or in hot environments. Proper functioning of sweat glands is vital for overall health and comfort.