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IMMUNE SYSTEM - Coggle Diagram

- - - - Neutrophils travel in blood and seek out foreign material. Mainly attack bacteria. 45% - 75% of white blood cells
        
        Called by macrophages for assistance.
        They fight very furiously (also kills healthy cells)
        
        generate barriers that trap + kill bacteria
        After five days they commit suicide to prevent too much damage
      - Macrophages (guard cells):
        
        locate and eat pathogens
        
        cause inflammation --> order blood vessels to release water into battlefield
        
        activate cells
        
        communicate --> messenger proteins communicate location for assistance
    - - More blood flow to infected area to recruit more white blood cells. Helps contain infection
- - - - They can develop a memory
    - - B cells recognise foreign antigen (proteins found on pathogens). Produce antibodies (molecules) that stick to antigen on surface of pathogens --> allows other immune cells to recognise it
      - T cells recognise foreign antigen (proteins found on pathogens). Produce molecules that do the killing