Question

Which of the following path is correct with respect to the passage of oxygen in the respiratory system?

• A. Nostrils $\to$ Trachea $\to$ Bronchi $\to$ Bronchioles $\to$ Alveoli
• B. Nostrils $\to$ Trachea $\to$ Bronchioles $\to$ Bronchi $\to$ Alveoli
• C. Nostrils $\to$ Bronchioles $\to$ Alveoli $\to$ Trachea $\to$ Bronchi
• D. Nostrils $\to$ Alveoli $\to$ Trachea $\to$ Bronchioles $\to$ Bronchi

Answer 1

The correct option is A Nostrils $\to$ Trachea $\to$ Bronchi $\to$ Bronchioles $\to$ Alveoli

The pathway of air (containing oxygen) through the respiratory system is:

Nostrils $\to$ Pharynx $\to$ Trachea $\to$ Primary bronchi (right & left) $\to$ Secondary bronchi $\to$ Tertiary bronchi $\to$ Bronchioles $\to$ Alveoli.

So, the correct answer is A.