erythrocytes Erythrocytes
Ther are equal numbers of red and white
in any given mm3 of blood, what is the approximate ratio of the number of red blood cells (erythrocytes) to white blood cells (leukocytes)
abnormally high number of immature leukocytes
leukemia
There are about a thousand times as many red blood cells as white cells. Consider that the red blood cells (or erythrocytes) in a mm3 (or microliter) of blood number about five million in an average man (a few less in a woman). The white blood cells (or leukocytes) number only 5-6 thousand per mm3 so the ratio is about a thousand fold.
There are approx. 7,000 leukocytes per cubic millimeter of blood.
The increased number of leukocytes can occur abnormally as a result of an infection, cancer, or drug intake; however, leukocytosis can occur normally after eating a large meal or experiencing stress.
Blood cells are predominantly red cells. They outnumber the white cells by a factor of 1000:1 to 2000:1 in normal humans. The composition of blood is 55% plasma and 45% formed elements. The formed elements are mostly red blood cells, which make up 44% of total blood volume. The remaining 1% consists of white blood cells and platelets. Appx. 700:1 Blood consists of formed elements (red blood cells, white blood cells and platelets) and plasma. Red blood cells (erythrocytes) account for 99.9% of cells. Plasma 55%, and Cells 45%.
leukocytosis l
Mononucleosis
Leukopenia
Lymphocytes are the "agranulocytes" in larger number in blood.