<P> Blood volume is the volume of blood (both red blood cells and plasma) in the circulatory system of any individual . </P> <P> A typical adult has a blood volume of approximately 5 liters, with females generally having less blood volume than males . Blood volume is regulated by the kidneys . </P> <P> Blood volume (BV) can be calculated given the hematocrit (HC; the fraction of blood that is red blood cells) and plasma volume (PV), with the hematocrit being regulated via the blood oxygen content regulator: </P> <Dl> <Dd> B V = P V 1 − H C (\ displaystyle BV = (\ frac (PV) (1 - HC))) </Dd> </Dl>

How many liters of blood in woman body