Becoming a Mature Heart Cell (IMAGE) Johns Hopkins Medicine Caption Induced pluripotent stem cells have many hurdles to overcome on the path to becoming mature heart tissue. Credit Credit: Hiroko Uchida Usage Restrictions Please credit source. 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.