Schwann Cells (IMAGE) University of California - San Diego Caption Schwann cells (colored purple) forming myelin sheathes (green) around axons (brown). Credit Image courtesy of David Furness, Wellcome Images Usage Restrictions Image courtesy of David Furness, Wellcome Images 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.