"gastrointestinal tract"的定义和意义

What is "gastrointestinal tract"?

The gastrointestinal tract is a long, hollow organ system that extends from the mouth to the anus and is responsible for the digestion, absorption, and elimination of food and waste. It includes organs such as the esophagus, stomach, small intestine, and large intestine. The gastrointestinal tract performs essential functions, including the breakdown of food into nutrients, the absorption of nutrients into the bloodstream, and the elimination of waste materials. It plays a crucial role in nourishing the body, maintaining energy levels, and supporting overall digestive health.