The percentage of blood made up of red blood cells is a frequently measured number known as the hematocrit. The ratio of cells in normal blood is 600 red blood cells for each white blood cell and 40 platelets.
- courtesy Kishan.
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The ratio of the volume occupied by packed red blood cells to the volume of the whole blood as measured by a hematocrit
a measuring instrument to determine (usually by centrifugation) the relative amounts of corpuscles and plasma in the blood
The hematocrit (Ht or HCT) or packed cell volume (PCV) or erythrocyte volume fraction (EVF) is the proportion of blood volume
PCV (Packed Cell Volume), hematocrit: A laboratory test to monitor relative number of red blood cells present in the blood. A blood sample is placed in a tiny glass tube and spun in a centrifuge. The cells are heavier than the plasma and are compacted at one end of the tube