Question

Which of the following is not a conducting part of respiratory system in humans?

• A. Bronchiole
• B. Alveolar duct
• C. Nasal chamber
• D. External nostrils

Answer 1

The correct option is B

Alveolar duct

The respiratory system is divided into two parts - the conducting part and the respiratory part. The conducting part consists of the air transmitting passages, i.e. from the external nostrils to the bronchioles. This part of the respiratory system serves to filter, warm and humidify air on its way to the lungs. Alveoli and their ducts constitute the respiratory part. This is where the actual exchange of gases occurs.