Lung Anatomy

Your lungs take air in to give your body oxygen, which the body needs to work. Your lungs, like all the tissues in your body, are made up of billions of tiny specialized cells. Old lung cells die and are replaced by new, identical lung cells. This natural process helps ensure healthy lungs.

Front view of lungs in chest. Trachea is windpipe that provides pathway for air to enter lungs. Lymph nodes are filters that help prevent illness and infection. They are part of lymph system. Pleural space is between lungs and chest wall. Space is lined on both sides by tissue called pleura. Lobes are sections of each lung. Normal pair of lungs has five lobes. Bronchial tubes are airways from the trachea to the lungs. Chest wall contains ribs and muscles. Blood vessels are pathways that carry blood into lungs and throughout body. Mediastinum is space between lungs that holds heart. Closeup of cross section of airway showing cells.