GENERAL HISTOLOGY

Detailed explanation-1: -When internal temperature rises, the eccrine glands secrete water to the skin surface, where heat is removed by evaporation. If eccrine glands are active over most of the body (as in horses, bears, and humans), they are major thermoregulatory devices.

Detailed explanation-2: -As soon as your body’s internal temperature starts rising, your hypothalamus (a small region in your brain) tells eccrine sweat glands distributed all over your body that it’s time to start cooling you down by producing sweat.

Detailed explanation-3: -When the body temperature rises, such as when exercising on a hot day, the dermal blood vessels dilate, and the sweat glands begin to secrete more sweat.