set empty and full stomach. heaviness of stomach, bloating, pain in the alimentary tract and acid heartburn. duodenal problems and

abdomen abdominal ache acid alimentary background bloating care cartoon colon concept design diet digestion digestive disease duodenal eat empty esophagus fire full gas gastric gastritis gastrointestinal gut health healthy heartburn heaviness human icon illustration indigestion intestine isolated nutrition organ pain problem problems set stomach symptom system tract ulcer vector white