What is the main function of sweat glands?

The primary function of sweat glands is to cool the body. When the body's internal temperature rises, whether due to exercise, heat, or other factors, the sweat glands produce sweat, which is primarily composed of water. As sweat evaporates from the skin's surface, it dissipates heat and lowers the body's temperature through the process of evaporative cooling. This thermoregulatory mechanism is crucial for maintaining homeostasis and preventing overheating.

While sweat can contain some waste products, its main role is definitely tied to thermoregulation rather than waste elimination. Additionally, sweat glands do not produce hormones or serve as a primary lubrication source, as would be the case with other glands in the body such as sebaceous glands.