ZEPHYR / SCIENCE PHOTO LIBRARY ZEPHYR / SCIENCE PHOTO LIBRARY
Stomach. Coloured X-ray of a healthy human stomach (yellow/green) with part of the duodenum (the first part of the small intestine) at lower left (green). The stomach is a curved, sac-like organ that receives food from the oesophagus (not seen). The stomach plays a role in the initial digestion of food. Food then passes into the intestine. Bones (brown) of the spinal column are visible. Such images of soft tissues require a contrast medium to be used. For viewing the stomach, a barium meal may be swallowed. The barium is opaque to X-rays, allowing X-ray examination of the digestive tract to diagnose conditions such as inflammation, stomach ulcers and bleeding.
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