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IMMUNE SYSTEM (LEVEL (Organ (Secondary (Spleen, Mucosa Associated Lymphoid…

- - - - Bone marrow: Site of B cells maturation
      - Thymus Gland: Site of T cells maturation
    - - Spleen
      - Mucosa Associated Lymphoid Tissue (MALT)
      - Lymph nodes
  - - - Granulocytes
        
        Eosinophils
        
        Moderate allergic reaction
        
        Neutrophils
        
        Phagocytes foreign body
        
        Basophils
        
        Promote inflammation by secrete interleukin-1
        
        provide protection against parasites
      - Agranulocytes
        
        Monocytes
        
        Lymphocytes
        
        B- lymphocytes
        
        Produce antibodies
        
        NK Cells
        
        Destroy cancer cells trough apoptosis
        
        Control viral infections
        
        T- lymphocytes
        
        Play major role in cell mediated immunity
- - - - Activate and proliferate helper T-cells and cytotoxic cells
      - Destroy intracellular pathogen,cancer and transplanted cells.
    - - Primary defense against extracellular pathogens,bacteria and circulating virus
      - Synthesize and secrete antibodies by B-lymphocytes
  - - - Inflammatory response
        
        Mast cell release histamine
        
        Bring in WBC to kill pathogen
        
        Allergic response occur
      - Phagocytosis
        
        Trap and phagocytes foreign substances and cellular debris
        
        Eg:Macrophages
    - - eg: skin