"Pulmonary" refers to anything related to the lungs and the respiratory system. It comes from the Latin word "pulmonarius," which means "of the lungs." The pulmonary system is essential for breathing, allowing oxygen to enter the body and carbon dioxide to be expelled. Common pulmonary conditions include asthma, chronic obstructive pulmonary disease (COPD), and pulmonary fibrosis. These conditions can affect lung function and overall health. Medical professionals often use tests like pulmonary function tests to assess lung capacity and diagnose issues related to pulmonary health.