Breathing and gas exchange are vital physiological processes that sustain life. The respiratory system facilitates the intake of oxygen from inhaled air, which then diffuses into the bloodstream through specialized membranes in the lungs. Simultaneously, carbon dioxide, a metabolic waste product, diffuses from the bloodstream into the lungs to be exhaled. This intricate process ensures a constant supply of oxygen to cells for metabolism and the removal of carbon dioxide. The harmonious coordination between the respiratory system and other bodily functions exemplifies the remarkable complexity of life science. Understanding this process is essential for science learners as it unravels the fundamental mechanisms that support life in all organisms.