正常人体能在不同气象条件下通过体温调节使体内代谢产热量(以及外界接受的热量)与散热量保持相对平衡,以保证体温维持在正常范围内。当气温升高到接近皮肤温度时则以汗液蒸发散热为主。每1克汗液可散发0.58千卡的热量。汗液水占98～99％,固体物占1～2％,其中氯化盐为主,还有锌、锰等微量元素。正常人体内含锌量约为2克左右,当体内锌含量减少时机体的生长发育迟 Normal body in different meteorological conditions through the thermoregulation of the body so that the body heat metabolism (and the outside world to accept the heat) and heat to maintain a relatively balanced, to ensure that body temperature maintained within the normal range. When the temperature rises close to the skin temperature sweat evaporation heat-based. Each 1 gram of sweat can emit 0.58 kcal of heat. Sweat water accounts for 98 ~ 99%, solid accounted for 1 to 2%, of which chloride-based, as well as zinc, manganese and other trace elements. Normal body zinc content of about 2 grams, when the body zinc content decreased body growth and development of late