Leukocytes are synonymous with "white blood cells" and may be classified as one of the following: neutrophils, eosinophils, monocytes,lymphocytes or basophils. These include both the granulocytes and the mononuclear cells of the lymphoid system. A total WBC count is the sum of all leukocytes.
The body’s own white blood cells or leukocytes (lou-ko-cites) (WBC’s) fight disease and maintain immune function in the blood. In general, white blood cells in a blood transfusion serve no purpose, but are transfused along with the red blood cells, platelets or plasma. These unnecessary passengers can carry viruses, immune suppress patients and release toxic substances.
White blood corpuscles. These play the main role in the body's fight against infection. These cells are sub-divided into three main groups: Granulocytes, Lymphocytes, Monocytes. With healthy people, only a small portion of the leukocytes present in the body are found in the blood; most leukocytes are to be found in the bone marrow or in various organs and tissues. An increase in the number of leukocytes in the blood is an indication of an illness.