Advertisement Although the lung damage produced by pulmonary fibrosis cannot be restored, drugs and treatments can occasionally assist to alleviate symptoms and improve quality of life. A lung transplant may be appropriate for certain persons. The lungs are a pair of muscle-powered pumps that work together to move blood through our bodies. You use your muscles when you breathe in and out because this action forces air into and out of your lungs. Your lungs will always be working to keep their airways open and clear out mucus or other material that might block these airways. When you breathe in, small muscles in your lungs contract, forcing air into your bronchi (the large airways that branch off of the trachea). This movement pushes any mucus or other material up toward the top of your chest where it can be coughed up later. Healthy lungs contain few if any scars or lesions caused by injury or disease. The lungs are made up of many small lobes that join together to form larger lobes. Each lobe is divided into sections called bronchi that carry air into and out of the lung. The bronchi are surrounded by soft tissue called pleura which covers and protects them. Lungs are a common site for cancer to start.