What happens to the diaphragm when a person breath in or inhales

During inhalation, the diaphragm contracts and moves downward, increasing the space in the chest cavity. Air is sucked in through the nose and mouth and eventually travels to the lungs, which expand.

During exhalation, the diaphragm relaxes and moves upward, reducing the space in the chest cavity. This forces carbon dioxide out of the lungs through the nose and mouth.

Explanation:

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