Stretch test (VIDEO) Brown University This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption Researchers in the Morgan lab use a mechanical testing instrument to stretch the tissue rings and measure their stiffness and tensile strength. Credit Courtesy of the Morgan lab at Brown University Usage Restrictions Contact media officer for permissions. License Original 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.