Embryonic mouse heart (IMAGE) Max Delbrück Center for Molecular Medicine in the Helmholtz Association Caption A 3D image of an embryonic mouse heart. Endothelial cells vascularize the heart muscle walls (shown in green). This process establishes the coronary vasculature that nourishes the heart muscle. Credit Max Delbrück Center Usage Restrictions none License Original 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.