The primary function of the gastrointestinal tract is to digest food and absorb nutrients. It includes various organs, such as the stomach, small intestine, and large intestine, each playing a specific role in breaking down food. The GI tract physically and chemically processes food, allowing for the extraction of essential nutrients like vitamins, minerals, carbohydrates, proteins, and fats. After absorption, waste products are excreted from the body. Thus, the GI tract is vital for maintaining overall health and providing energy.