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An inhalation and exhalation involves changes in the lung volume.Volume change creates pressureGradients that move air in or out of respiratory tractBoyle's law explain the process of pulmonary ventilation is explained that during inspiration, the volume of the thoracic cavity increases and air is drawn into the lung. The increase in volume is brought about partly by contraction of the diaphragm and partly by the actions of the intercostals muscles.
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10y ago

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