(IMAGE) ETH Zurich Caption Dendritic cells (green) are migrating actively within lymphatic capillaries (red; microscopic image). Credit ETH Zurich / Erica Russo 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.