Work done on Breathing (Cont/…) |
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During breathing there are a number of forces that play an important role in defining the work done. To simplify things, breathing can be compared to a piston that is attached by springs to the wall of the cylinder. On moving the piston down, three forces have to be overcome: |
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1. |
elastance of the springs |
Elastance of lung and chest wall |
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2. |
frictional resistance between piston and cylinder wall |
Frictional resistance within the tissues and in air movement |
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3.
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inertia of the piston |
Inertia of the lung and chest wall and air movement |
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