Macrophages (IMAGE) University of Bern Caption Peritoneal macrophages (red) seal laser-induced injury (green) with a thrombus-like aggregate within minutes. Credit Joel Zindel / University of Calgary 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.