Bioprinting Spheroids (IMAGE) Penn State Caption PSU aspiration bioprinted on the bottom of a glass Petri dish. The spheroids of tissue can be seen. Credit Ozbolat's Lab/Penn State Usage Restrictions non commercial use only 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.