Rosettes and ”Physco” cell (IMAGE) University of Rhode Island Caption Rosettes as seen with an electron microscope and a growing ”Physco” cell Credit Left and center images (rosettes), Eric Roberts; right image ("Physco” cell), Alison Roberts. 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.