The normal digestive system; different methods of treatment; symptoms - heartburn, nausea and vomiting, indigestion, acute abdominal pain, chronic abdominal pain, acute diarrhoea, chronic diarrhoea, malabsorbtion, constipation, miscellaneous symptoms; diagnoses - irritable bowel syndrome, ulcerative colitis and Crohn's disease, diverticulitis, cancers of the digestive system.