The primary role of the respiratory system is to facilitate gas exchange, primarily oxygen (O2) intake and carbon dioxide (CO2) removal. This system comprises organs such as the lungs, trachea, bronchi, and diaphragm. When we inhale, oxygen-rich air enters the lungs, where oxygen diffuses into the bloodstream and is transported to cells throughout the body. Simultaneously, CO2, a waste product of cellular metabolism, is expelled from the bloodstream into the lungs and then exhaled. The efficiency of the respiratory system is vital for maintaining cellular function and overall homeostasis in the body.