Defence-Systems

  • The immune system destroys pathogens and toxins
  • It also protects against the same pathogen in the future

White blood cells

  • Can ingest and destroy pathogens by detecting chemicals released by pathogens and uses enzymes to destroy it - Phagocytosis.
  • Certain types of white blood cells called lymphocytes produce antibodies which are protein molecules, They stick to the pathogens which triggers the pathogen to be destroyed. Antibodies are specific.
  • Can produce antitoxins which stick to toxins to prevent them from damaging cells.