In this system, the process of digestion has many stages, the first of which starts in the mouth.
Digestion involves the breakdown of food into smaller and smaller
components, until they can be absorbed and assimilated into the body.
The digestive system is a group of organs working together to convert food into energy and basic nutrients to feed the entire body. Food passes through a long tube inside the body known as the alimentary canal or the gastrointestinal tract (GI tract).
