Temperature-dependent spermatogenesis defects (IMAGE) National Institutes of Natural Sciences Caption Blue bars indicate the germ cell types observed in testis explants cultured at the indicated temperatures. *No germ cells survived at 40°C. Credit NIBB Usage Restrictions Please only use with appropriate credit. License Original 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.