A
pouch-shaped
organ that forms part of the
digestive tract between the
esophagus and the
duodenum. It is made of
muscle and lined with a
mucous membrane that protects it from the
acids which it secretes to aid
digestion.
Also, the belly or abdomen. Note that the actual stomach is located higher up than the region of the body which is usually called the stomach. Many stomachaches are intestinal, just as heartburn is really a stomach condition.