The lungs are vital organs for respiration, facilitating the exchange of gases between the air we breathe and our bloodstream. They expand and contract thousands of times daily, taking in oxygen and expelling carbon dioxide. The lungs contain millions of tiny air sacs called alveoli, where this gas exchange takes place. Did you know that if all the alveoli were laid flat, they would cover an area about the size of a tennis court? This extensive surface area is crucial for efficiently exchanging gases, ensuring our body's cells receive the oxygen needed for energy production.