Stomach Mucous

Your stomach is the only organ in your body capable of eating itself, so to speak: Digestive juices contain enough enzymes and hydrochloric acid to burn a hole through your stomach wall. Obviously, human biology has solved the problem. There's a dense layer of mucous lining your stomach and intestines, which forms an effective barrier against corrosion. Under normal conditions, the mucous is renewed faster than it's eaten away by acids and enzymes .