Normal digestive system. Coloured frontal barium X-ray of the abdomen of a female showing digestive organs. The stomach is seen at upper right, with the intestines beneath it. The stomach is a sac- like organ that digests the food, which is then passed onto the small intestine (centre right). The food is further digested as is passes from the small intestine to the large intestine (running up from centre left, directly beneath the stomach and down centre right). In the final part of the large intestine, the sigmoid colon (lower right), water is absorbed from the digested food. The resulting faeces is then stored in the rectum (lower centre) until it is passed. The bones (blue) of the ribs (top left), spine (centre) and pelvis (bottom) are also seen.