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空气成年人每次吸气约半升,按每分钟呼吸18次计算,一昼夜通过肺的空气约一万三千升之多,重约14公斤。成人每天需氧0. 75公斤,排出二氧化碳约0. 9公斤,人脑重量只占体重2%,但需氧量却占全身需氧量的20%-25%。水成年人体重64%是水,日平均大约需水6斤左右。每天排出水分约占体重的5%左右,其排出途径通过:尿3斤左右;汗1斤;呼出1斤;粪0. 3斤。人体若失水占体重之6-7%,即会发烧,如失水12%以上,就能引起死亡。
Each inhalation of air about half an adult inhalation, breathing 18 times per minute calculation, a day and night through the lungs of about 13,000 liters of air, weighing about 14 kg. Adult aerobic 0. 75 kg, about 0. 9 kg of carbon dioxide emissions, the human brain weighs only 2% of body weight, but the oxygen demand accounts for 20% -25% of systemic oxygen demand. Water Adult 64% of body weight is water, on average about 6 pounds of water required. The daily discharge of water accounts for about 5% of body weight, the discharge path through: urine about 3 pounds; Khan 1 kg; exhaled 1 kg; manure 0.3 kg. If the body water loss accounted for 6-7% of body weight, that will have a fever, such as dehydration more than 12%, can cause death.