Being germ free

Mackenzie Miller

First line body defences

  • Healthy, unbroken skin blocks many pathogens.
  • Mucus blocks some pathogens from entering through the mouth and nose.
  • Cilia traps the pathogens for you to sneeze out.

Second line body defences

  • Acids in the stomach can kill pathogens.
  • A fever can kill some pathogens.
  • White blood cells fight pathogens. Some form antibodies that kills certain antigens.