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Nose the air enters and exits here. It filters the air that we inhale.
Pharynx in respiratory system it serves as the passageway of air from oral and nasal cavities to the trachea.
Trachea is a hollow tube that serves as the passageway of the air that will go to the brochi
Bronchi are two braching tubes that lets air pass that will go to the bronchioles.
Bronchioles are the finest parts of bronchi, it ensure that air will be delivered to every alveolus.
Alveoli are also called air sacs, the exchange of gas( O^{2}  and  CO^{2} happens hear