Gastrointestinal Tract

The gastrointestinal tract (GIT), also known as the digestive system, is a series of organs that work together to digest food and absorb nutrients. The GIT begins at the mouth and ends at the anus. The major organs of the GIT include the mouth, esophagus, stomach, small intestine, large intestine, and rectum.

How the Gastrointestinal Tract Works

The GIT breaks down food into nutrients that can be absorbed by the body. The process of digestion begins in the mouth, where food is chewed and mixed with saliva. The saliva contains enzymes that begin to break down the carbohydrates in food. The food is then swallowed and travels down the esophagus to the stomach.

The stomach is a J-shaped organ that secretes gastric juices, which contain hydrochloric acid and enzymes that further break down food. The stomach also churns the food, which helps to mix it with the gastric juices. The food is then passed into the small intestine.

The small intestine is a long, coiled tube that is responsible for the majority of the digestion and absorption of nutrients. The small intestine is lined with villi, which are small, finger-like projections that increase the surface area for absorption. The small intestine also secretes enzymes and bile, which help to break down food and absorb nutrients.