egd, diagnosis of gastric ulcer

acidity anatomy bile bilious bladder bubble cancer cholic diagnosis digestion digestive disease duodenal duodenum dyspepsia egd erosion esophagus fibroscopy gall gallbladder gaster gastrectomy gastritis gastroduodenal gastroduodenitis gastroenterologist gastroenterology gastroscopy heartburn helicobacter hepatic human illustration indigestion inflammation intestines medical medicine mucous physiology pylori science sphincter stomach system therapy tract treatment ulcers