Final answer:
The chest cavity is a resonant system driven by the diaphragm and chest wall, leading to efficient breathing due to its critically damped nature and resonance frequency.
Step-by-step explanation:
When discussing URM with rigid diaphragms, it appears that your question may include a typo or misunderstanding, as 'URM' typically refers to Unreinforced Masonry in engineering contexts and seems out of place when talking about the human body's respiratory mechanics. However, the provided information outlines how the chest cavity in our bodies is an excellent example of a resonance system. The diaphragm and chest wall act as drivers for the oscillations within the chest cavity, which facilitates the process of the lungs inflating and deflating during breathing. This biological system is configured to be critically damped, ensuring that the oscillations occur at a resonant frequency that promotes efficiency in the respiratory process.