ANATOMY

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: -As food passes through the GI tract, it mixes with digestive juices, causing large molecules of food to break down into smaller molecules. The body then absorbs these smaller molecules through the walls of the small intestine into the bloodstream, which delivers them to the rest of the body.

Detailed explanation-3: -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.

Detailed explanation-4: -True. Ingestion: The process where food is taken in through the mouth and broken down by teeth and saliva. It is the first step in the process of nutrition.