Interdigital Cell Death in Tetrapods (IMAGE) Cell Press Caption This cartoon shows how interdigital cell death and environmental oxygen are correlated in various tetrapods. Credit Cordeiro et al. / Developmental Cell Usage Restrictions Credit required. 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.