Endothelial liver cell (IMAGE) Bielefeld University Caption A high-resolution, microscopic fluorescent image of an endothelial liver cell (red: cell membrane, green: actin cytoskeleton, blue: cell nucleus). Endothelial cells are flat cells that line the inside of blood vessels. Credit Bielefeld University/V. Mönkemöller, W. Hübner Usage Restrictions The image may only be used with appropriate caption and credit. 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.