Normal Lungs vs. Emphysema Lungs (IMAGE) Broncus Technologies Caption Normal lungs vs. hyperinflated lungs that push down on the diaphragm and make it difficult to breathe. Credit Broncus Technologies Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.