Question

Blood in litres in human body can be donated at a time

Answer 1

hloo my frnd ...
i think u want to know that how much blood can be donated at a time so your answer is
The average adult has about 10 pints of blood in his body. Roughly 1 pint is given during a donation. A healthy donor may donate red blood cellsevery 56 days, or double red cells every112 days. A healthy donor may donate platelets as few as 7 days apart, but a maximum of 24 times a year.

hope it may help u☺☺

Answer 2

every adult human beings male and female 5 to 6 liter peron between 18 to 16year in 45 kg can donate one blood unit is 350 ml once every three months