Stem Cell Division (IMAGE) Stowers Institute for Medical Research Caption This image shows asymmetric stem cell division in a planarian flatworm showing a smaller cell with DNA (labeled in red) and a larger cell with a stem cell marker (smedwi-1 RNA, labeled in green). Scale bar is 10 micrometers. Credit Sánchez Alvarado Lab 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.