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Diaphragm and intercostal muscles contracts during inhalation, thereby, expanding thoracic cavity. This expansion results in increase in thoracic cavity volume, consequently, decreasing pressure inside it(Boyle's law). The decreased pressure results in formation of pressure gradient between lungs and atmosphere.
Diaphragm and intercostal muscles contracts during inhalation, thereby, expanding thoracic cavity. This expansion results in increase in thoracic cavity volume, consequently, decreasing pressure inside it(Boyle's law). The decreased pressure results in formation of pressure gradient between lungs and atmosphere.
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