What is the Function of the Lung?

The lungs are two spongy, cone-shaped organs located in the chest cavity.  They are part of the respiratory system, which brings oxygen into the body and releases carbon dioxide outside of the body. The lungs are divided into lobes.  The right lung is divided into three lobes: the upper, middle and lower. The left lung is divided into two lobes:  upper and lower. Two tubes, known as bronchi, arise from the trachea (the windpipe) and conduct air into the left and right lung.   

The lungs are covered by a thin membrane, which is called the pleura. The space between the lung and the pleura is known as the pleural cavity, which normally contains a small amount of fluid that helps the lungs maintain smooth movement within the chest cavity.

 Alamo City Cancer Council Diagram of the Chest and Lungs