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The diaphragm is a dome-shaped muscle located beneath the lungs that plays a crucial role in respiration. When it contracts, it increases the volume of the thoracic cavity, creating a negative pressure that draws air into the lungs. This process allows oxygen to flow in, where it can then be exchanged for carbon dioxide in the bloodstream. Relaxation of the diaphragm decreases thoracic volume, helping to expel carbon dioxide during exhalation.

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4w ago

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