JOHN BAVOSI / SCIENCE PHOTO LIBRARY JOHN BAVOSI / SCIENCE PHOTO LIBRARY
Digestive-excretory disorders. Illustration of three disorders of the digestive system and one of the excretory system. At upper left is a hiatus hernia, where the upper portion of the stomach protrudes from the abdominal cavity into the chest cavity through the diaphragm. At upper right are gallstones in the gallbladder, hard deposits of salts or cholesterol that form when the chemical composition of bile is upset. At lower left is a kidney stone in the ureter of a kidney, formed by the precipitation of the mineral salt calcium oxalate from the urine. At lower right is an adenocarcinoma cancer in the pylorus of the stomach. For the individual images, see C029/0649-53.
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