First slide

Human Respiratory System

Question

The inhaled air encounters which of the flowing first?

Easy

A

Respiratory bronchiole
B

Primary bronchiole
C

Alveolar duct
D

Tertiary bronchus

Solution

The correct path of inhaled air is: external nostril $\to$ nasal chamber $\to$ internal nostril $\to$ pharynx $\to$ larynx $\to$ trachea $\to$ primary bronchus $\to$ secondary bronchus $\to$ tertiary bronchus $\to$ primary bronchiole $\to$ secondary bronchiole $\to$ tertiary bronchiole $\to$ terminal bronchiole $\to$ respiratory bronchiole $\to$ alveolar duct $\to$ alveolar sac $\to$ alveolus.

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