One of the possible symptoms of lung cancer is shortness of breath. When you inhale, the air moves ...
Read the full transcript »
One of the possible symptoms of lung cancer is shortness of breath. When you inhale, the air moves down your main airway, called your trachea. The air then moves into smaller airways that branch into your lungs. These smaller airways end in flexible elastic sacs that expand and contract as you breathe in and out, filling and emptying your lungs. Cancer is caused by cells that multiply faster than normal and, unlike normal cells, cancer cells don't die. All these cells growing together in one spot forms a mass or tumor. If not caught early, a mass in your lungs can grow large enough to block flow of air in and out of the airways and sacs. Eventually, the area that cannot receive air may collapse.