Cow Cartilage (image) Penn State Share Print E-Mail Caption A plug of 3-D bioprinted cartilage on top of a plug of osteocondral material -- bone and cartilage. The bone sits in a bath of nutrient media. Credit Ozbolat, Penn State Usage Restrictions Non commercial use only Share Print E-Mail 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.