RCBs in vessels.mp4 (VIDEO) Duke University This video is under embargo. Please login to access this video. Caption Changes in the density of circulating RBCs as a glassfrog awakes. Video covers a small region of abdominal tissues in transmitted light. Credit Carlos Taboada Usage Restrictions Usage with credit 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.