汗液的排出,有调节体温的作用,同时也排出部分代谢废物。正常情况下,发汗是一种反射活动,汗腺的分泌可由温热性刺激或精神紧张引起。当热引起血管扩张时,血液中的水将热量传递至皮肤表面,然后随汗水蒸发,将热传到周围环境中,在高温环境下,人体的出汗量可高达每天8~12升。正常出汗对人体健康有利,但是出汗过多,就可能导 Sweat discharge, there is the role of regulating body temperature, but also discharge some of the metabolic waste. Under normal circumstances, sweating is a reflex activity, sweat gland secretion can be caused by warm or nervous stress. When heat causes blood vessels to dilate, the water in the blood transfers heat to the surface of the skin, which evaporates as the sweat evaporates, transferring heat to the environment. At high temperatures, the body sweats up to 8 to 12 liters per day. Normal sweating beneficial to human health, but too much sweating, it may guide