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红十字会经常要组织一些人义务献血活动,献出的血液将用于给病人输血,以抢救病人的生命。有不少人担心,献血虽是好事,但会伤害身体。其实,成年人适量的献血并不危害人的健康。一个人全身的血量可以用每公斤体重有多少毫升的血量来推算。成年男性每公斤体重含血量为78毫升,成年女性则为66毫升。如一个体重为60公斤的成年男性,身上的血量就会:78×60=4680毫升。这么多的血液并不是全部都在“上班”工作的。真正参加循环的血量,仅仅是总量的70—80%,其余的血液都
The Red Cross Society often organizes voluntary blood donation activities for some people. The blood donated will be used to transfuse blood to the patients so as to save the lives of the patients. Many people worry that although blood donation is a good thing, it can harm the body. In fact, the right amount of blood donation does not endanger human health. A person’s whole body of blood can be used per kilogram of body weight how many ml of blood to calculate. Adult male blood volume per kilogram of body weight 78 ml, adult women compared to 66 ml. If an adult male weighing 60 kg, the body’s blood will be: 78 × 60 = 4680 ml. Not so much blood is all working on “work ”. Really participate in the circulation of blood, only 70-80% of the total, the rest of the blood are