Question

Which is the correct sequence of the air passage in man?

• A. Nasal cavity $\to$ larynx $\to$ pharynx $\to$ trachea $\to$ bronchi $\to$ bronchioles $\to$ alveoli
• B. Nasal cavity $\to$ pharynx $\to$ trachea $\to$ larynx $\to$ bronchi $\to$ bronchioles $\to$ alveoli
• C. Nasal cavity $\to$ larynx $\to$ bronchi $\to$ pharynx $\to$ trachea $\to$ bronchioles $\to$ alveoli
• D. Nasal cavity $\to$ pharynx $\to$ larynx $\to$ trachea $\to$ bronchi $\to$ bronchioles $\to$ alveoli

Answer 1

The correct option is D Nasal cavity $\to$ pharynx $\to$ larynx $\to$ trachea $\to$ bronchi $\to$ bronchioles $\to$ alveoli

The air is taken in the respiratory system via the nostrils in the nasal chamber. The air moves across the different parts of pharynx namely nasopharynx, oropharynx and laryngopharynx, from where it is directed to the larynx. The larynx is placed over the trachea so that the air moves to the trachea or windpipe. From the trachea, it travels through the bronchi , bronchioles and ultimately reaches the alveoli for exchange with blood. Hence, the correct sequence is:

Nasal cavity $\to$ pharynx $\to$ larynx $\to$ trachea $\to$ bronchi $\to$ bronchioles $\to$ alveoli