The gastrointestinal (GI) tract is a continuous tube extending from the mouth to the anus, comprising the oesophagus, stomach, small intestine, large intestine, and rectum, responsible for digestion, absorption of nutrients, and elimination of waste. Understanding the GI tract is crucial in clinical practice for diagnosing and managing conditions such as inflammatory bowel disease, gastrointestinal infections, and cancers. A key complication associated with GI tract disorders is malnutrition, which can significantly impact overall health.