Developmental Trajectory (IMAGE) Keck School of Medicine of USC Caption By superimposing images of several of the kidney’s filtering units, known as nephrons, researchers can visualize how little these structures deviate from a stereotypical developmental trajectory. Credit Image by Nils Lindström/McMahon Lab/USC Stem Cell Usage Restrictions none 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.