(a) Ifa healthy man donates 200 cc of his blood, approximately what percentage of the total total blood of his body is given? (b) What is the number of RBC present in that 200 cc of blood?

Explanation

(a) The blood volume of healthy man is 5 litre or 500 So 200cc is `("200*100")/("5000")=4% ` of the total blood volume.
(b) 1 cu or 1000 cu mm blood contains 5 million or 5 *`10^(6)` RBC
1 cc or 1000cu mm blood contains= 5*`10^(6)* 1000` RBC
200 cc blood contains = 5*`(10^(6)`*1000*200*RBC =`10^(12) RBC