Biology for IGCSE & O level - Gas Exchange In Humans (Section 1 - No. 21)
Which of these is the order of air passage after the mouth?
Trachea -> Lungs -> Alveoli
Pharynx -> Trachea -> Lungs -> Bronchioles -> Alveoli
Trachea -> Bronchioles -> Lungs -> Alveoli
Lungs -> Trachea -> Pharynx -> Bronchi
Explanation
The air pathway is: Pharynx, Trachea, Lungs, Bronchioles and finally, Alveoli.
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