Making 3-D Heart Tissue (IMAGE) York University Caption York U chemistry grad student in the lab purifying a molecule that will eventually be delivered to the surface of the cell to make the cell stick to other cells to form tissues. Credit York University 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.