What is a similarity between a bell jar model and lungs?

Both a bell jar model and lungs function as systems that facilitate the movement of air in and out. In the bell jar model, the movement of air is controlled by changes in pressure within the jar, similar to how the diaphragm and intercostal muscles in the lungs create pressure changes that allow for inhalation and exhalation. Additionally, both systems can demonstrate principles of gas laws, such as how volume and pressure are inversely related.