<Li> White blood cells--Leukocytes </Li> <Li> Platelets--Thrombocytes . </Li> <P> Together, these three kinds of blood cells add up to a total 45% of the blood tissue by volume, with the remaining 55% of the volume composed of plasma, the liquid component of blood . The volume percentage of red blood cells in the blood (hematocrit) is measured by centrifuge or flow cytometry and is 45% of cells to total volume in males and 45% in females . </P> <P> Haemoglobin (the main component of red blood cells) is an iron - containing protein that facilitates transportation of oxygen from the lungs to tissues and carbon dioxide from tissues to the lungs . </P>

Percentage of blood made up of red blood cells