Cells Cardiac Regeneration (IMAGE) Max-Planck-Gesellschaft Caption Heart muscle cells from the atrium repair the damaged ventricle: 96 hours after the ventricle was damaged, a large number of atrium cells (green) migrated from the atrium (A) into the ventricle (V). Together with the surviving muscle cells of the atrium (red), the ventricle is mostly functional again. Credit MPI for Heart and Lung Research 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.