Intestine (IMAGE) Institute for Bioengineering of Catalonia (IBEC) Caption Intestine cross section showing its characteristic folded structure Credit Amy Engevik Usage Restrictions Give credit to Amy Engevik 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.