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Lungs

...  the pressure in the chest cavity, air from the lungs then travels out of the airways. This cycle is repeated every time you breathe. The air you breathe goes into the trachea and travels down to the vocal cords in the larynx up to the bronchi. From the bronchi, the air then passes through each lung until it reaches the alveoli. The oxygen concentration in each air sac is high; this causes the  ...