Cells in lab (IMAGE) Emory Health Sciences Caption Xu’s research used special heart muscle cells that contract at regular intervals and, working together, cause the cells to beat like normal heart. Credit Emory University Usage Restrictions N/A 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.