Lung cancer is a disease in which cells within the lung tissue become cancerous.
The lungs are the body’s respiratory organs, conical in shape, one on each side, and located in the chest cavity. When inhaling, the lungs draw oxygen into the body; when exhaling, they expel metabolic waste from the body’s cells as carbon dioxide. The different parts of the lungs are called lobes. The left lung has two lobes. The right lung is slightly larger, with three lobes. The membrane that wraps around the outside of the lungs is called the pleura. The branches of the airways on either side of the left and right lungs that enter the lungs are called bronchi. The bronchi are sometimes involved by lung cancer. The interior of the lungs consists of air sac-like alveoli and tube-like fine bronchioles.