Bladder cells (IMAGE) University of Copenhagen - Faculty of Science Caption The bladders, with which the surfaces of many quinoa varieties are completely covered, look like small balloons on a stem. Credit University of Copenhagen Usage Restrictions Image may be used with appropriate caption and credit 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.