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人体由100多万亿个细胞组成,全身被皮肤覆盖,总面积约2平方米。心脏,约重260克,容积为750毫升,在收缩时每次喷射到血管内的血液为7 0毫升,每分钟排血量为5 000毫升,24小时喷送血液7500千克。心脏每分钟跳动60~100次。人一生跳动约3亿次。肺脏,约重1000~1300克,正常人每分钟通气量4200~6600毫升。胃,人的一生约有10~15吨食物,50~80吨水经过胃的加工和处理。肝脏,约重1300克,是体内最大的消化腺,肝细胞每天约分泌100毫升胆汁,能悄
The body consists of more than 100 trillion cells, the body covered by the skin, with a total area of about 2 square meters. The heart weighs about 260 grams and has a volume of 750 milliliters. When contracted, 70 milliliters of blood is injected into the blood vessel each time, and 500 milliliters of blood is evacuated every minute. Blood is sprayed for 7,500 kilograms in 24 hours. Heart beats per minute 60 to 100 times. People beat about 300 million times throughout life. Lung, weighing about 1000 ~ 1300 grams, normal per minute ventilation 4200 ~ 6600 ml. Stomach, human life about 10 to 15 tons of food, 50 to 80 tons of water through the stomach’s processing and processing. Liver, weighs about 1300 grams, is the largest digestive gland in the body, liver cells secrete about 100 ml of bile per day, can be quiet