What is the diaphragm
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Explanation:
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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a simplified drawing showing the appearance, structure,or workings of something a schematic representation
Explanation:
'a diagram of the drowning room'
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