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their number is about 5000-10000 per cubic mm in human blood.
The "white blood count" is the number of white blood cells (WBCs) per cubic millimeter. Normal counts range from 4000 to 10,500. (Normal red blood cell counts are in the range of three to five million per cubic millimeter, which is why blood is red.) The white blood cells are differentiated into 5 major subgroups or "lines," each of which has a different function. Mostly, they are involved in protecting the body from disease, dectroying invaders, cleaning up after injuries and such things. Hence, one can tell if a disease process is present by looking at the total WBC count and the proportions of the different WBC lines. One can also detect the presence of leukemia or other blood disorders from the WBC count. Doctors will watch the WBC count changes over time to gauge the efficacy of disease treatments.
If there is no blood in our body we cant live, we need RBCs and WBCs in our blood.
Leucocytes or white blood cells(WBCs)
Overproduction of WBCs (white blood cells)
White blood cells (WBCs).
WBCs
Usually leukocytosis is used for too many WBCs. It means an abnormally high number of white blood cells (leukocytes) in the blood circulation and that is defined as more than 10,000 leukocytes per cubic millimeter of blood.
There are usually more RBCs than WBCs. If you have an abnormal increase in WBCs, you have an infection or leukemia (a type of cancer).
WBCs have granules while RBCs dont
White blood cells WBCS or leukocytes are cells of the immune system involved in defending the body against both infectious disease and foreign materials.
WBCs & platelets namely: neutrophils and monocytes