The gastrointestinal tract (GI) is the pathway from your mouth to your esophagus, stomach, and small and large intestines. In the GI tract, nutrients and water from food are absorbed to help keep your ...

Researchers identified and characterized rare cell types in the esophagus, stomach and upper part of the small intestine, using single cell RNA sequencing. They provide detailed gene expression ...

Medically reviewed by Qin Rao, MD Symptoms of GI bleeding include stomach pain, vomiting blood, or having black, tarry ...

The mouth starts the digestion process by breaking food down into a more easily digestible form. It does this through a combination of mechanical and chemical digestion. After people take food in ...

Gastrointestinal diseases can cause symptoms like heartburn, constipation, diarrhea, and abdominal pain. Functional GI diseases affect how the digestive system works without visible organ damage.