1 - Carbon dioxide leaves the capillaries and enters the alveoli., 2 - From the alveoli, the CO2 travels into the bronchioles., 3 - The CO2 travels from the bronchioles into the bronchi and then it enters the trachea., 4 - From the trachea, the CO2 goes through the larynx and the pharynx., 5 - It then goes out the nose and mouth. ,

What are the steps of exhalation? (Breathing out)

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