Cell with Organelles (image) University of California - San Diego Caption An electron microscope image of a mammalian cell with organelles depicted. In autophagy, some elements of a cell are degraded and recycled to generate nutrients and energy to sustain and preserve the whole cell. Credit UC San Diego School of Medicine Usage Restrictions None 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.