As the thoracic cavity (and therefore the lungs) increase in size, the pressure inside increases proportionally.

Name: As the thoracic cavity (and therefore the lungs) increase in size, the pressure inside increases proportionally.
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Quizplus · Accepted Answer

According to Boyle's Law, as the volume of a gas increases, the pressure decreases, assuming temperature remains constant. Therefore, as the thoracic cavity increases in size, the pressure inside the lungs decreases.

As the Thoracic Cavity (And Therefore the Lungs) Increase in Size