The pulmonary system, also known as the respiratory system, is responsible for the exchange of gases in the body. It includes the lungs, trachea, bronchi, and alveoli. When we breathe in, oxygen enters the lungs and is transferred to the blood, while carbon dioxide, a waste product, is expelled when we exhale. The primary function of the pulmonary system is to supply oxygen to the body and remove carbon dioxide. This process is essential for maintaining the body's metabolism and overall health. Proper functioning of the pulmonary system is crucial for activities such as exercise and daily living.