Worm (IMAGE) University of Alabama in Tuscaloosa Caption By engineering simple systems, like the nematode roundworm C. elegans, shown under a microscope in this photo depicting fluorescent illumination of select neurons within the animal, scientists are gaining a better understanding of cellular mechanisms associated with complex human diseases, like Alzheimer's. Credit Chip Cooper, The University of Alabama 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.