Comparison of Blood Vessels in the Lung (image) Ottawa Hospital Research Institute Caption These are micro-tomography scans of blood vessels in the lung. Image A shows a normal lung. Image B shows the injury caused by oxygen. Image C shows a lung given oxygen and treated with stems cells from a human umbilical cord. Credit Dr. Bernard Thébaud Usage Restrictions None 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.