What is the primary function of sweat glands?

The primary function of sweat glands is to regulate body temperature. These glands play a crucial role in thermoregulation through the process of sweating, which helps cool the body when it overheats. When the body temperature rises—due to exercise, heat, or other factors—the sweat glands secrete sweat onto the surface of the skin. As the sweat evaporates, it removes heat from the body, cooling the skin and underlying tissues.

This regulatory mechanism is vital for maintaining homeostasis, ensuring that the body's temperature remains within a safe and efficient range. While other functions, such as the excretion of certain substances through sweat, may occur, the main purpose of sweat glands centers on temperature control.