Gastrointestinal tract illustration (IMAGE) University of Missouri-Columbia Caption An illustration of the non-invasive way for identifying the major functions of the gastrointestinal tract. Credit Illustration is courtesy of Marina Resnyanskaya. 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.