Human defence systems


Students should be able to describe the non-specific defence systems of the human body against pathogens, including the:

  • skin
  • nose
  • trachea and bronchi
  • stomach.
  • Students should be able to explain the role of the immune system in the defence against disease.
  • If a pathogen enters the body the immune system tries to destroy the pathogen.
  • White blood cells help to defend against pathogens by:
  • phagocytosis
  • antibody production
  • antitoxin production.