- Diaphragm muscles contract and flattens out
- Volume of thoracic cavity increases
- Air pressure inside thoracic cavity decreases
- Air flow into lung
- Ribcage move forward and upward
Exhalation Mechanisms
- Diaphragm relax and arches upwards
- Volume of thoracic cavity decreases
- Air pressure inside thoracic cavity inrcreases
- Air flow out of the lung
- Ribcage move downward and inward
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