This komed stomach pathology model demonstrates various stages of gastritis from a light gastric ulcer to a perforation. The stomach section with the esophagus and duodenum attachment in half life size shows the following pathological changes of the stomach: * Erythematous gastritis * Erosive gastritis * Hemorrhagic gastritis * Healing stage with scar formation * Atrophic gastritis * Hypertrophic gastritis * Bleeding ulcer * Perforated ulcer. An additional relief model of the enlarged stomach wall shows: * Healthy mucous membrane * Acute gastritis in the antral area * Erosive gastritis with mucous membrane defects * Bleeding ulcer (eroded muscularis mucosae) * Perforated ulcer (all stomach layers eroded) Stomach with ulcers mounted on a base for display in the classroom or doctors office. The Stomach Pathology Model is 5.5 x 3.9 x 6.7 in and weighs 0.66 lbs.