stomach and intestines;  gastrointestinal tract;  digestive organs
 stomach-ache;  stomach pain;  gastralgia
 stomach acid;  gastric acid
 lying heavy on the stomach;  being uneasily digested
 stomach lining;  gastric wall
 gastritis;  gastric catarrh
 dyspepsia;  indigestion;  weak digestion
 stomach tube;  nasogastric tube
 stomach pumping;  gastric irrigation;  gastric lavage;  gastric suction;  gastrolavage
 gastrospasm;  stomach spasm;  stomach cramps
 gastrospasm;  stomach spasm;  stomach cramps
 gastric dilation;  dilation of stomach
 gastroesophageal reflux disease
 gastric perforation;  perforation of the stomach
 abomasum (fourth compartment of the stomach of a ruminant);  maw;  rennet-bag
 gastric fistula;  gastrosomy;  gastrosoma
 omasum;  psalterium;  third compartment of the stomach in ruminants