Describe the mechanics of ventilation as it relates to Boyles' Law. Include the following in your answer : intra-alveolar pressure, intrapleural pressure, atmospheric pressure, inhalation, and exhalation
What will be an ideal response?
Boyles' Law states that the pressure within a chamber is inversely correlated to the size of the chamber. The thorax is a closed chamber and it encloses the lungs. When muscles cause the thorax to increase in volume, the intrapleural pressure (around the lungs) decreases, causing the lungs to expand and decrease the intra-alveolar pressure (inside the lungs). When the intra-alveolar pressure drops below atmospheric pressure, air rushes into the lungs (inhalation occurs). When the thorax recoils or is compressed, its volume decreases and its pressure increases, which in turn increases the intra-alveolar pressure. When intra-alveolar pressure exceeds atmospheric pressure, air rushes out of the lungs (exhalation occurs).
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