Optical Tweezers Lab (IMAGE) University of Copenhagen - Niels Bohr Institute Caption The blood vessel tissue is examined using phase-contrast microscopy, which makes it possible to follow the movements in the tissue, before, during and after cell division. Credit (Ola Jakup Joensen, Niels Bohr Institute) Usage Restrictions (Ola Jakup Joensen, Niels Bohr Institute) 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.