I would say bicycling because jogging and jumping jacks can be bad on your knees because of the impact. Biking is pretty smooth though and wouldn't have much of an impact. Hope this helps :)
The muscles of the ventricles depolorize.
The answer is <em>C.) The stethoscope was invented because the physician did not want to pt his head on women's' chests to listen to their heart and lungs.
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<em />The physician saw a problem (that he didn't want to place his head on women's chests to listen to their heart and lungs), so he solved it by inventing a stethoscope.
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I hope this helped!! :)) Have a blessed day!
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