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Q.

Which of the following would be the correct sequence of the passage of air during respiration?

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a

Nasal cavity → pharynx → larynx → trachea → bronchi → bronchioles

b

 Larynx → nasal cavity’ → pharynx → trachea

c

Larynx → pharynx trachea → lungs

d

 Pharynx → nasal cavity → larynx → trachea bronchi → bronchioles

answer is A.

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Detailed Solution

The nasal cavity opens into the pharynx which is a common passage for the transfer of food and air. Pharynx leads to the larynx which is also called the voice box. 

Tracheae carry air to the lungs and branch into the left and right bronchus for entering the left and right lungs. Inside the lungs, each bronchus divides and subdivides into terminal bronchioles.

Hence, the correct sequence of the passage of air during respiration is Nasal cavity → pharynx → larynx → trachea → bronchi → bronchioles.

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