What is the main function of sweat glands in the skin?

The main function of sweat glands in the skin is to regulate body temperature. When the body's internal temperature rises, whether due to environmental heat or physical activity, sweat glands produce sweat, which is mostly composed of water and salts. As sweat evaporates from the skin's surface, it helps cool the body down. This process of evaporative cooling is crucial for maintaining homeostasis, allowing the body to function optimally even under varying temperature conditions.

While other functions related to skin and glands exist, such as oil production for moisture, immune defense, and forming a protective barrier, those are primarily carried out by other skin structures, such as sebaceous (oil) glands and the skin layer itself. The primary role of sweat glands is specifically tied to thermoregulation, making them essential for maintaining a stable internal environment in response to external changes.