Beetle rectum (IMAGE) University of Copenhagen - Faculty of Science Caption Microscopic cross-section of the beetle's hindgut. The picture shows the dry stool in magenta colors surrounded by the intestine in gray. The malpighian tubule of the beetle is seen in purple. Photo: Kenneth Veland Halberg Credit Photo: Kenneth Veland Halberg Usage Restrictions With credit License Original 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.