Body's Line Of Defense

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  • It acts as a barrier between invaders and your body. Skin forms a waterproof mechanical barrier. Microorganisms that live all over your skin can’t get through your skin unless it’s broken.
  • How does our skin protect use from pathogens?
  • Each different type of white blood cell kills the parasites. Neutrophils, for example, kill bacteria by ingesting them.
  • What does our white blood cells do and how do they kill germs?
  • Antibodies circulate in the blood stream and can appear anywhere throughout the body. If circulating antibodies come in contact with the target or antigen they were generated to fight, then the antibodies join and kill to the target.
  • What is an antibody and how does it work?
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