What is mean by diaphragm...
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The diaphragm is a thin skeletal muscle that sits at the base of the chest and separates the abdomen from the chest. It contracts and flattens when you inhale. This creates a vacuum effect that pulls air into the lungs.
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Diaphragm, dome-shaped, muscular and membranous structure that separates the thoracic and abdominal cavities in mammals.
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