Pizza enters your mouth and you mechanically break down food into smaller pieces and your saliva breaks down food chemically. The food then passes through your esophagus and into the stomach where the food is further broken done by mechanical and chemical digestion. And then once the food enters your small intestine the nutrients get absorbed by the walls of the small intestine and into the blood stream, the blood then takes these nutrients to the different parts of the body and cells use this nutrients to create energy through cellular respiration.
