Graphical Simulation of Gut Coiling (IMAGE) Harvard University Caption Top: The researchers produced a graphical simulation of gut looping in a chick embryo (stage E16), using a model based on geometry, the mechanical properties of the tissues, and the relative growth rate of the gut tube and the mesentery. Bottom: An actual chick gut (E16). Credit Image courtesy of T. Savin and A. Shyer. 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.