Track of a Single Sperm Cell with a Bent Tail, in 2 Dimensions (image) The Optical Society Share Print E-Mail Caption This image shows the track of a single sperm cell with a bent tail, in two dimensions (left) and three dimensions (right). Credit Credit: Biomedical Optics Express. Usage Restrictions Must include caption & 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.