Nose, Trachea and Bronchi Defences
The respiratory system has specialized defences to trap and remove pathogens before they reach the lungs.
What is the role of mucus and cilia?
What is Nose, Trachea and Bronchi Defences?
"Respiratory defences are mechanical and biological mechanisms in the airway that prevent the entry of pathogens into the lungs."
How do the trachea and bronchi help defend the body against disease?
Choose the correct explanation: how do the trachea and bronchi help defend the body against disease?
Select how do the trachea and bronchi help defend the body against disease?
Respiratory Defences
Nose hairs and mucus trap particles that may contain pathogens.
Trachea and bronchi secrete mucus to trap pathogens.
Cilia (tiny hairs) waft mucus up to the throat to be swallowed.
Mucus is a sticky substance that physically traps pathogens; cilia act like a conveyor belt.
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