What is the primary purpose of sweat glands in the human body?

The primary purpose of sweat glands in the human body is to regulate body temperature. When the body's internal temperature rises, whether due to physical exertion, environmental heat, or other factors, sweat glands produce sweat. This sweat evaporates from the skin's surface, leading to a cooling effect that helps to lower the body's temperature and maintain homeostasis.

While options like providing moisture to the skin or removing toxins may occur as secondary functions when sweating takes place, the fundamental role of sweat glands is tied to thermoregulation. This physiological response is crucial for preventing overheating and ensuring optimal biological function. The body's ability to sweat is a significant factor in how it copes with temperature fluctuations and maintains a stable internal environment.