This story is part of a series exploring human anatomy and physiology complexities. Each story in this collection showcases discoveries reshaping our understanding of the body's inner workings, ...

People are often reminded that they are their own unique person -- and a new study says that's particularly true of the digestive tract. Dissections of a few dozen deceased individuals revealed ...

Crohn’s disease can cause inflammation in any part of your gastrointestinal tract. Most commonly, people have it in their small bowel, also called your small intestine. This is referred to as small ...

Small intestinal bacterial overgrowth (SIBO) occurs when large numbers of bacteria colonize the small intestine. It can cause bloating, diarrhea, or constipation. Treatment options include antibiotics ...