A) Effect of breathing on the chest size of some classmate: Name of the classmates Size of the chest during inhalation(cm) Size of the chest during exhalation(cm) Difference in size(cm)
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During inhalation, ribs move up and outwards and diaphragm moves down. ... During exhalation, ribs move down and inwards, while diaphragm moves up to its former position. This reduces the size of the chest cavity and air is pushed out of the lungs.
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