percentage of blood made up of red blood cells
Blood cell 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.[1] 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.[2]
Blood transfusion Globally around 85 million units of red blood cells are transfused in a given year.[2]
Blood Blood is a body fluid in humans and other animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells.[1]
Vein Veins are less muscular than arteries and are often closer to the skin. There are valves in most veins to prevent backflow.