Various cells in the stomach secrete digestive enzymes and hydrochloric acid. These substances break down food so the body can absorb nutrients. The stomach is a muscular organ in the upper abdomen ...

In the stomach, so-called parietal cells are responsible for acid production. They react not only to the body's own messenger molecules, but also to bitter-tasting food constituents such as caffeine.

Common conditions such as indigestion and heartburn as well as peptic ulcers, autoimmune gastritis and stomach and esophageal cancers have one thing in common – they involve disruptions of the normal ...