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Which of following best describes the biomechanics of breathing pump handle motion. lever action. inspiration. expiration?
Wiki User
∙ 12y ago
Pump handle motion
Wiki User
∙ 12y ago
The pump handle motion refers to chest expansion during inspiration, when the diaphragm contracts and rib cage lifts up and out. This motion is achieved through a lever action, where the ribs act as levers to lift and expand the chest cavity to allow air to enter the lungs. During expiration, the chest relaxes, the diaphragm relaxes, and air is pushed out of the lungs.
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