In the respiratory system, the main difference between the conducting portion of the respiratory system is its parts and function. The former contains air-transmitting passages (with respiratory system acting as a filter) as well as special portions functioning for smell, phonation and alimentation. The latter however, is a location where actual gas exchange occurs which of course contains different parts than the conduction portion.
When we overuse a joint, the bursae become inflamed, resulting in bursitis, a condition in which the bursae lose their function and the movements become painful. Excessive use of some joints can cause bursitis in sports like cycling, tennis, and long-distance running.
