Cell Tension (IMAGE) Duke University Caption Epicardium cells covering the heart regenerate in a wave led by large cells that contain multiple nuclei per cell (magenta). These cells are under more mechanical tension (aqua streaks) than trailing cells which divide to produce cells with one nucleus each. Credit Jingli Cao, Duke 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.