ZEPHYR / SCIENCE PHOTO LIBRARY ZEPHYR / SCIENCE PHOTO LIBRARY
Stomach. Coloured X-ray of a barium meal (pink, upper right) in a healthy human stomach (brown, upper centre) with the coiled small intestine (pink, lower right). The stomach is a curved, sac- like organ that receives food from the oesophagus (not seen). The stomach aids the initial digestion of food. Food then passes into the intestine. Bones (blue) of the spinal column are visible. A barium meal is a radio-opaque substance that is swallowed to allow X-ray examinations of the digestive tract.
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