Collagen Encasing (IMAGE) Duke University Caption Human arteries are constructed from cells embedded within collagen gels (top) that are treated to remove more than 90 percent of the water content (bottom). This technique increases the mechanical strength of the engineered tissues, allowing for immediate culture under physiological conditions without waiting for the tissues to mature. Credit George Truskey Lab, Duke University 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.