Human Cell (IMAGE) Université de Genève Caption Human cell, whose microtubules forming the cytoskeleton radiate from the centrosome, their organizing center constituted of 4 centrioles (the 4 cylinders). Credit © UNIGE Usage Restrictions None 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.