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Dora Bračko, 2nd year 2013/2014 Mentor: A. Žmegač Horvat LEUKOCYTE white cell part of the immune system infection, foreign materials 7000 to 9000 cells per µL of blood 1% AGRANULOCYTES (MONONUCLEAR) GRANULOCYTES (POLYMORPHONUCLEAR) NEUTROPHIL GRANULOCYTE 62% multi-lobed nucleus bacterial or fungal infections first responder phagocytosis of bacteria EOSINOPHIL GRANULOCYTE 2.3% bi-lobed nucleus; cytoplasm full of granules parasitic infections allergic reactions BASOPHIL GRANULOCYTE 0.4% bi- or tri-lobed nucleus; large granules allergic and antigen response histamine LYMPHOCYTE 30% nucleus eccentric in location immune response B cells, T cells, natural killer cells MONOCYTE 5.3% kidney-shaped nucleus phagocytosis presentation of pieces of pathogens to T cells in tissues macrophages FIXED LEUKOCYTES migrate into body tissues Kupffer cells histiocytes dendritic cells mast cells microglia DISORDERS quantitative proliferative (leukocytosis): neutrophilia, eosinophilia leukopenia: neutropenia, lymphocytopenia qualitative volume, conductivity, granularity REFERENCES http://en.wikipedia.org/wiki/White_blood_cell http://www.britannica.com/EBchecked/topic/3 37728/white-blood-cell http://health.howstuffworks.com/humanbody/systems/circulatory/blood2.htm