Blood Cells (IMAGE) Emory Health Sciences Caption A scanning electron micrograph shows a red blood cell, an activated platelet (in yellow) and a white blood cell. The ability to map the magnitude and orientation of forces on a cell provides a new tool for investigating not just blood clotting but a range of biomechanical processes. Credit National Cancer Institute 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.