Rat Sperm (IMAGE) Kumamoto University Caption Image of a single rat spermatozoa. Total length: about 200μm Credit Professor Naomi Nakagata Usage Restrictions This image may only be used in conjunction with the accompanying release, or stories written about the work described in the release with reference to the original work. 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.