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Blood (circulatory system), Hematopoiesis: production of blood cells,…

- - - - protect
      - diapedesis: movement out of blood vessels
      - Granulocytes
        
        Neutrophill
        
        lobed nucleus, 5 cytoplasmic granules that are purple
        
        Eosinophil
        
        fight infections and ellergic reactions
        
        Basophil
        
        release histamine and heparin, irregularly shaped blue granules that obscure nucleus
      - agranulocytes
        
        monocyte
        
        largest WBC
        
        lymphocyte
        
        live for years, T&B Cells (immunity), smallest WBC
      - Platelets (thrombocytes)
        
        repair of damaged blood vessels, Source of PDGF, serotonin
    - - squeeze through capillaries, cell membrane is close to hemoglobin, surface area for diffusion
  - - - most abonant, determinant of oncotic\colloid osmotic pressure, from liver
- - - - deficiency of RBC
      - pernicious anemia: lack of intrinsic factor
      - Leukopenia
        
        WBC count below 3,500 microliter
        
        from posisoning or infections
        
        Edema
        
        deficiency in plasma proteins