Mammalian Cell Biology, Human Anatomy and Physiology · Circulatory System · 2 marks · Numerical answer
Total blood volume in litres divided by body weight in kilograms is 0.07. Assume blood consists only of plasma and red cells. Find plasma volume in L for a 70 kg man with hematocrit 52%, to two decimals.
Total blood volume=.07×70=4.9 L. Hematocrit .52 is the red-cell volume fraction, leaving plasma fraction 1−.52=.48 under the stated two-component model. Plasma volume=4.9×.48=2.352 L, rounded to 2.35 L.
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