And each person contains two different lungs. We have a right lung and we have a left lung. Now, these lungs are are found in the chest portion of our body, and that is called the thorax. So within our thoracic cavity, we have our two lungs. So if this is the right side of the body and this is the left side of the body, then this is the left lung and this is our right lung. Now, because of the position of the heart, it turns out that our left lung is slightly smaller than our right lung.