Nephron Forming in Human Kidney (IMAGE) University of Southern California Caption At an early stage, a nephron forming in the human kidney generates an S-shaped structure. Green cells will generate the kidneys' filtering device, and blue and red cells specialized regions responsible for distinct nephron activities. Credit Image courtesy of Stacy Moroz and Tracy Tran/Andy McMahon Lab, USC Stem Cell Usage Restrictions Please use credit as is. 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.