HUMAN NUTRITION

Detailed explanation-1: -1) Food is contained in the gastrointestinal tract from the time of ingestion until it is completely digested and the waste prepared for elimination.

Detailed explanation-2: -Food moves through your GI tract by a process called peristalsis. The large, hollow organs of your GI tract contain a layer of muscle that enables their walls to move. The movement pushes food and liquid through your GI tract and mixes the contents within each organ.

Detailed explanation-3: -Digestion is a process that converts nutrients in ingested food into forms that can be absorbed by the gastrointestinal tract.

Detailed explanation-4: -Digestion involves mixing food with digestive juices, moving it through the digestive tract, and breaking down large molecules of food into smaller molecules. Digestion begins in the mouth, when you chew and swallow, and is completed in the small intestine.