Human Vascular System in Mice (1 of 2) (IMAGE) Helmholtz Association Caption Three-dimensional reconstruction of a vascular system made of human endothelial cells in mice 20 days after injection of the spheroids. Image taken with a confocal microscope, stained green. Credit Professor Hellmut Augustin, Joint Research Division "Vascular Biology" of the Mannheim Medical Faculty of the University of Heidelberg and the German Cancer Research Center Usage Restrictions Use credit line 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.