Beating Heart Muscle Cells (VIDEO) Gladstone Institutes 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 The video shows beating heart muscle cells, or cardiomyoctes, at day 10 of differentiation. Credit Jeff Alexander Usage Restrictions Please contact Gladstone Press Relations for reprint permissions. 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.