Diagram of Gator Muscles that Move Lungs (image) University of Utah Share Print E-Mail Caption The top diagram shows the position of an American alligator's liver and lungs and four muscles or muscle groups that the animals use to shift their lungs forward, backward or sideways to control their pitch and roll in water. The gator's head (not shown) is to the left and its tail to the right. The muscles are the diaphragmaticus, ischiopubis, rectus abdominis and internal intercostals. The bottom diagram shows how the liver moves toward the tail and some of the muscles contract when the alligator inhales. Credit C.G. Farmer and David Carrier. Usage Restrictions None Share Print E-Mail 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.