Creeping T-cells (IMAGE) Max-Planck-Gesellschaft Caption The picture shows the movement of creeping T-cells (green) inside blood vessels (red) over a period of about 20 minutes. It clearly shows that some T-cells leave the blood vessels -- the long exposure lets them leave a green trail as the cells make their way through the brain tissue. Credit Image: Max Planck Institute of Neurobiology / Bartholomäus 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.