The higher-pressure atmospheric air will then move into the lungs until the pressures equilibrate. During inspiration, the lungs stretch, increasing volume, which results in a decrease in pressure. What will happen to the pressure? The pressure will decrease as a result of the balloon being extended to a larger volume. Now, imagine you stretch that balloon and increase its volume. This will be similar to our lung volume before inspiration. Imagine holding an inflated balloon the pressure inside the balloon is the same as the atmosphere’s pressure. Applying Boyle’s Law to Respirationīoyle’s law can be applied to any closed system. This image demonstrates Boyle’s Law and the interaction of gas molecules at varying volumes. Likewise, the final pressure and volume are defined by P 2 and V 2, respectively.įigure 1. The following formula expresses Boyle’s Law, where P 1 represents the initial pressure, and V 1 represents the initial volume. If volume decreases within the system, then pressure increases, and if volume increases, then pressure decreases. The relationship between pressure and volume can be explained by Boyle's Law, which states that, at a constant temperature, the volume of a fixed amount of gas is inversely proportional to its pressure, as seen in figure 1. In order to understand the mechanisms of breathing, we must first understand pressure relationships. The difference in atmospheric pressure and pressure in the lungs is what results in inhalation and exhalation. How to apply knowledge of pulmonary mechanics and respiration to real-life scenarios.About surface tension and the effects of surfactant in relation to breathing.How to describe the varying lung volumes and capacities.How to explain changes in lung volume during breathing.The various pressure relationships within the respiratory system and how these pressures contribute to gas exchange. How to explain the mechanism of breathing in relation to pleural pressure, alveolar pressure, and atmospheric pressure.
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