Sperm Structure (1 of 2) (IMAGE) University of York Caption Virtual human sperm in cervical mucus analogue (3D view): the tail is stabilized by the reinforced coating (blue). Credit Dr. Hermes Gadelha, University of York. Usage Restrictions None 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.