Blood Cells (image) University of Southern California - Health Sciences Share Print E-Mail Caption From left to right, a red blood cell, a platelet and a white blood cell are shown. Credit Public domain image courtesy of the Electron Microscopy Facility at The National Cancer Institute at Frederick Usage Restrictions Please include caption and credit. 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.