Final answer:
The eccrine sweat gland releases secretions that help in thermoregulation and cooling of the body through evaporation. It produces hypotonic sweat that is mainly composed of water.
Step-by-step explanation:
The eccrine sweat gland releases secretions that are important in thermoregulation and cooling of the body through evaporation. Eccrine sweat glands are found all over the skin's surface, but are especially abundant on the palms of the hand, the soles of the feet, and the forehead. When the body becomes warm, these glands produce hypotonic sweat, which is mostly water, to cool the body through evaporation from the skin surface.