Perspiration, also known as sweating, is the production of fluids secreted by the
sweat glands in the
Two types of
sweat glands can be found in humans:
eccrine glands and
 The eccrine sweat glands are distributed over much of the body.
humans, sweating is primarily a means of
thermoregulation, which is achieved by the water-rich secretion of the eccrine glands. Maximum sweat rates of an adult can be up to 2–4 liters per hour or 10–14 liters per day (10–15 g/min·m²), but is less in children prior to puberty.
Evaporation of sweat from the skin surface has a cooling effect due to
evaporative cooling. Hence, in
hot weather, or when the individual's muscles heat up due to exertion, more sweat is produced. Animals with few sweat glands, such as
dogs, accomplish similar temperature regulation results by panting, which evaporates water from the moist lining of the oral cavity and
armpits that sweat like those of
primates such as humans.
 Although sweating is found in a wide variety of mammals,
 relatively few (exceptions include humans and horses) produce large amounts of sweat in order to cool down.