Fig. 2 (IMAGE) Osaka University Caption Process of cytoplasmic elimination in sperm. Sperm is formed in the testis. During the formation of sperm, Sertoli cells surround the sperm. The eliminated cytoplasm is left in the Sertoli cells. Credit 2023, Masahito Ikawa, 2023 Shimada et al., PNAS Usage Restrictions Credit must be given to the creator. License CC BY 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.