Cell Extrusion Mechanisms (IMAGE) National University of Singapore Caption This image shows cell extrusion mechanisms at different cell density. At low density, apoptotic cells are extruded by cell crawling and lamellipodia, while purse-string contraction drives extrusion at high density. Credit Mechanobiology Institute, National University of Singapore Usage Restrictions Credit image accordingly to: Mechanobiology Institute, National University of Singapore 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.