leukocyte
White blood cells (Latin leucocytus, from ancient Greek leukós "white" and kýtos "hollow"; German Leukozyt, English white blood cell or leukocyte, referred to as WBCs), is an important blood blood cells. In addition to white blood cells, the human body also contains red blood cells, platelets and plasma. White blood cells as part of the immune system help the body resist infectious diseases as well as foreign things. White blood cells can be produced by hematopoietic stem cells of bone marrow. White blood cells have nuclear, can be deformed movement, under normal circumstances white blood cells in healthy adults 4 × 109 to 1.1 × 1010 / liter of blood. White blood cells as immune cells, in the body when the cancer or other diseases, the total number of white blood cells within the blood or cell classification percentage may change. In addition to blood, white blood cells also exist in the lymphatic system, spleen, tonsils and other tissues of the body. Due to the abnormal proliferation of white blood cells caused by the loss of a malignant disease known as leukemia. ...