keeps pathogens out of the body. wash with soap and water right after cutting or scraping your skin. cover the cut with a bandage
wash away particles that might contain pathogens and can kill some pathogens.
traps dust and pathogens. you get rid of them when you cough,snezze,or blow your nose
in your nose trap dust and some pathogens that you breathe in. Other fine,hair-like structures line your windpipe. These trap particles in air moving into your lungs
protects you from illness because it ha a chemical that can kill some pathogens.
breaks down food.The same acid is stronger enough to kill many pathogens.