The mechanics of breathing
Lesson 10 / 12
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I can explain the mechanics of breathing and how air volumes are measured.
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During inhalation the intercostal muscles and diaphragm contract to expand the thoracic cavity volume so air rushes in.
During exhalation the intercostal muscles relax, the rib cage returns to its resting position and air is expelled.
A spirometer trace is a graphical representation of lung volume changes over time during breathing.
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