Q 1. what is diaphragm ?
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The diaphragm, located below the lungs, is the major muscle of respiration. It is a large, dome-shaped muscle that contracts rhythmically and continually, and most of the time, involuntarily. Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges.
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Diaphragm is the muscle between lungs and stomach which helps in respiration. It is used when you breathe :)
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