When the diaphragm flattens and the volume of chest cavity is increased.
Its internal pressure decreases and the air from the outside rushes into
lungs. This is called expiration (exhalation)
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When the diaphragm flattens and the volume of chest cavity is increased. Its internal pressure decreases and the air from the outside rushes into. lungs. This is called expiration (exhalation)
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When the diaphragm flattens and the volume of chest cavity is increased.
Its internal pressure decreases and the air from the outside rushes into
lungs. This is called inspiration (inhalation)
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