Vasculature in Action (VIDEO) Duke 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 After veins grow into the implanted engineered muscle fibers, blood cells can be seen traveling through them, sustaining and nourishing the new tissue. Credit 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.