Absolute and relative white cells count Absolute value (leukocytes/mm 3 = Total leukocyte count (cells/mm 3 X Relative value(%) Example: Total leukocyte.

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Presentation transcript:

Absolute and relative white cells count Absolute value (leukocytes/mm 3 = Total leukocyte count (cells/mm 3 X Relative value(%) Example: Total leukocyte count = 6000 Segmented forms (relative no.) = 50 % Segmented forms (absolute no.) =6000 X =3000/mm 3

Monocyte Macrophage system Monocytes in blood plus both fixed and wandering macrophages and few specialized endothelial cells in bone marrow, spleen and lymph nodes Reticuloendothelial system Brain: Microglia Skin: Histiocytes Lungs: alveolar macrophages Liver: Kupffer cells Spleen, Bone marrow: Sinusoids Lymphatic Channels: littoral cells

Inflammation 1 st line of defense: Macrophages 2 nd line of defense: Neutrophils 3 rd line of defense: Second macrophage invasion 4 th line of defense: increased production of granulocytes and monocytes by bone marrow

Feedback control of the macrophage and Neutrophil responses