The Gastrointestinal Tract is the continuous tube that runs from the mouth to the anus and processes food. It digests nutrients, absorbs water and electrolytes, and eliminates waste. In clinical medicine, it is a core focus of gastroenterology, hepatology, and GI surgery. The term is commonly used when describing symptoms, tests, and diseases affecting digestion and bowel function.

The Digestive System is the group of organs that break down food, absorb nutrients, and remove waste. It includes the gastrointestinal (GI) tract and accessory organs such as the liver, gallbladder, and pancreas. It is commonly referenced in gastroenterology, hepatology, nutrition, and GI surgery. It is also a core framework for evaluating abdominal symptoms and metabolic consequences of malabsorption.

Hepatology is the medical field focused on diseases of the liver and related organs. It commonly includes the gallbladder and bile ducts, and often overlaps with pancreatic and gastrointestinal care. Hepatology is used in clinics and hospitals to evaluate abnormal liver tests, jaundice, and chronic liver disease. It is a core area within gastroenterology and is closely linked to hepatobiliary surgery and transplant medicine.

A Gastroenterologist is a physician who specializes in diseases of the digestive system. The specialty includes the esophagus, stomach, small intestine, colon, rectum, and anal canal. It also commonly includes the liver, gallbladder, bile ducts, and pancreas. The term is used in clinics, hospitals, endoscopy units, and multidisciplinary care teams.

Gastroenterology is the medical specialty focused on the digestive system and related organs. It covers how the gastrointestinal (GI) tract works and what causes digestive disease. It is commonly used in hospitals and clinics for symptom evaluation, diagnosis, and long-term disease management. It also includes endoscopic testing and coordination with surgery, radiology, and pathology.