White Blood Cells and Immunity

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  • Created by: Olivia
  • Created on: 16-05-13 21:16

Your Immune System Deals with Pathogens

  • Pathogens are miroorganisms that cause disease e.g. certain types of bacteria and viruses
  • Once pathogens have entered your body they'll reproduce rapidly unless they're destroyed. Thats the job of your immune system, and white blood cells are the most important part of it
  • There are two different types of white blood cell- phagocytes and lymphocites


  • Phagocytes detect things that are 'foreign' to the body e.g. pathogens. They then engulf the pathogens and digest the,
  • Phagocytes are non-specific- they attack anything that's not meant to be there

Lymphocytes Produce Antibodies

  • Every pathogen has unique molecules (called antigens) on its surface
  • When certain white blood cells, called lymphocytes, come acorss a foreign antigen, they will start to produce proteins called antibodies- these lock on to the invading pathogens and mark them out for destruction by other white blood cells. The antibodies produced are…


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