<Tr> <Th> FMA </Th> <Td> 7148 </Td> </Tr> <Tr> <Td_colspan="2"> Anatomical terminology (edit on Wikidata) </Td> </Tr> <P> The stomach (from ancient Greek στόμαχος, stomachos, stoma means mouth) is a muscular, hollow organ in the gastrointestinal tract of humans and many other animals, including several invertebrates . The stomach has a dilated structure and functions as a vital digestive organ . In the digestive system the stomach is involved in the second phase of digestion, following mastication (chewing). </P> <P> In humans and many other animals, the stomach is located between the oesophagus and the small intestine . It secretes digestive enzymes and gastric acid to aid in food digestion . The pyloric sphincter controls the passage of partially digested food (chyme) from the stomach into the duodenum where peristalsis takes over to move this through the rest of the intestines . </P>

What is the structure and function of the stomach
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