neural and humoral factors. The heat is lost largely through the skin. The volume of heat loss from the body depends mainly upon the differences in temperature between the skin and the surroundings. The flow of blood to the vessels in the skin controlled by sympathetic nerves can regulate the skin temperature. Skin loses heat to the external environment by means of four processes radiation, conduction, convection and evaporation. Sweating is an active secretion of water by sweat gland, which removes heat from the skin as it evaporates. The main sweating control centre is located in hypothalamus Thermoregulation includes autonomic thermoregulation and behavioral thermoregulation Thermoreceptors are divided into peripheral thermoreceptors and central thermoreceptors, which receive cold or hot stimuli. The information converges to the nervous center, especially PO/AH in hypothalamus. The efferent impulse results in the production or loss of the heat so as to regulate the body temperatureneural and humoral factors. The heat is lost largely through the skin. The volume of heat loss from the body depends mainly upon the differences in temperature between the skin and the surroundings. The flow of blood to the vessels in the skin controlled by sympathetic nerves can regulate the skin temperature. Skin loses heat to the external environment by means of four processes :radiation, conduction, convection and evaporation. Sweating is an active secretion of water by sweat gland, which removes heat from the skin as it evaporates. The main sweating contro s center, especially PO/AH in hypot l centre is located in hypothalamus. Thermoregulation includes autonomic thermoregulation and behavioral thermoregulation. Thermoreceptors are divided into peripheral thermoreceptors and central thermoreceptors, which receive cold or hot stimuli. The information converges to the nervou halamus. The efferent impulse results in the production or loss of the heat so as to regulate the body temperature. 8