Mucus
Mucus traps dirt and bacteria.
Mucus in the respiratory tract traps disease-causing bacteria.
They are found primarily in the large intestine in numerous 'intestinal glands' with abundant goblet cells - they secrete no digestive enzymes but a good deal of mucus. Another offering is that they may be found scattered among the epithelial lining of organs, such as the bronchus and trachea, bronchioles in the respiratory tract; small intestines, and conjunctiva in the upper eyelid.
mucus!!!!!!mucus trap the dirt in the trachea!
Mucus helps in trapping pathogenic microorganisms and dust particles and prevent them from entering inside the lungs, second it keep respiratory tract moist so that friction is reduced. Another function of Mucus is to regulate the temprature of the inhaled air.
It traps it using a filtering system of hair and mucous.
Venus fly-traps and pitcher plants who has digestive enzymes to engulf insect's nutrition.
so they can digest everything they eat and drink for example fly traps eat flies but if they didn't have a digestive system they would die from the rot
I believe it is the epiglottis, it covers the trachea preventing you from aspirating fluid and such...
Foreign objects that enter the respiratory passageways are more likely to become lodged in the right primary (main) bronchus.
The cilia inside the trachea traps the small particles, then it is shot up the trachea to the esephogus to get destroyed by the stomach.
The respiratory system has a number of nonspecific defenses against disease. The hairs of the nose trap dust and pathogens. Mucus in the upper and lower respiratory system traps foreign bodies and pathogens. The cilia constantly move the mucus with this trapped material out of the system. The cough and sneeze reflexes also offer protection.