RBC Topography (image) University of Illinois at Urbana-Champaign Share Print E-Mail Caption This is the topography of a red blood cell as measured by the SLIM optical technique. Though the cell keeps its shape as it ages, the membrane becomes less flexible. Credit Gabriel Popescu Usage Restrictions None Share Print E-Mail 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.