non specific defense system

• non specific defense system:

  • not specific to the pathogen
  • prevents pathogens from entering the body
• skin:

  • acts as a physical barrier
  • produces antimicrobial secretions to kill pathogens
  • good microorganisms known as skin flora compete with the bad microorganisms for space and mineral ions
• nose:

  • has mucus which traps pathogens
  • hairs sweep them out of your body
  • prevent particles from entering your lungs
• trachea and bronchi:

  • secrete mucus to trap pathogens
  • cilia waft mucus upwards
• stomach:

  • produces hcl (strong acid)
  • kills pathogens