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LYMPHATIC/ IMMUNE SYSTEM (LYMPHATIC CELLS/ STRUCTURE/ ORGANS (Lymph nodes,…

- - - - - Single layer of epithelial tissue.
        - Larger lymph vessels have valves.
    - - - Transport lymph to lymph nodes
        - Lymph flows from distal regions of body toward heart.
  - - - - Found in spaces around cells.
        - Comes from substances leaking out of blood capillaries.
    - - - Helps bring O2 & nutrients to cell.
        - Removes wastes from cells.
        - When drained to lymph vessels, called lymph.
  - - - - Fluid circulates through out lymphatic system
        - Formed by interstitial fluid collected through lymphatic capillaries.
    - - - Returns proteins & excess interstitial fluid to bloodstream
        - Picks up bacteria & bring them to lymph nodes.
- - - - Digestive system
        
        Respiratory system
        
        Urinary system
        
        Reproductive system
    - - Regulate mucosal immunity
        
        Initiates immune responses to specific antigens encountered along mucosal surfaces
  - - - Palatine tonsils
        
        Pharyngeal tonsils
        
        Lingual tonsils
        
        Tubal tonsils
    - - Trap invading cells viruses - destroy them & make memory lymphocytes
  - - - - Several afferent lymph vessels
        - 1 or 2 efferent lymph vessels
        - Made of reticular tissue - provides a lot of spaces
    - - - Take in lymph - destroys antigens (foreign cells)
    - - - Cervical
        - Axillary
        - Inguinal
        - Mammary
  - - - Anterior superior mediastinum, anterior to heart & superior to sternum.
    - - Epithelial tissue
    - - Produce T-cells - destroy infected or cancerous cells.
  - - - Reticular tissue
    - - Destroy antigens
        
        Remove & "recyling" of erythrocytes
    - - Upper left quadrant
  - - - Eosinophils
        
        Phagocyte - allergens + parasites
      - Basophils
        
        Secrete substances - bring about inflammation
      - Neutrofils
        
        Phagocyte - bacteria
    - - Lymphocytes
        
        Natural killer cells
        
        T-lymphocytes, B-lymphocytes
      - Monocytes
        
        Largest type
        
        Main function: phagocytosis & antigen