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3 Cards in this Set
- Front
- Back
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Inspiration |
•external intercostal muscle and diaphragm contract •rib cage moves upwards and out and diaphragm flattens •thorax volume decrease pressure falls below atmospheric pressure and air flow in lungs •requires energy |
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Expiration |
•external intercostal muscle and diaphragm relax •rib cage moves down and inwards and diaphragm becomes curved •thorax volume decrease so pressure increases •doesn’t require energy |
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Forced expiration |
Requires energy •internal intercostal muscle contracts to pull rib cage down and in |
