*ULCERS, ACIDS*,*Stomach Ulcers* - also known as gastric ulcers, are painful sores in the stomach lining. - A type of Peptic ulcer disease - Affects the duodenum stomach & small intestines - when the thick layer of mucus protecting the stomach from digestive juices is reduced, allowing the digestive acids to eat away the tissues lining the… See more Gastrointestinal tract causing peptic ulcers