Nasal Cavity (Nose) - the prefered entrance and exit of air that we inhale and exhale.
Nasal passages - it moistens,warms and filters the air we breathe.
Trachea - it is a hollow tube that serves as the passageway of air that will go to the bronchi.
Bronchi - two branching tubes that lets the air pass that will go to the bronchioles.
Bronchioles - ensures that air is delivered to each alveoli.
Alveoli - the exchange of oxygen and carbon dioxide happens here.