Food must Be Digested

Before it can supply building material or heat or energy. Food must be eaten and digested. Digestion is the series of changes through which the food passes that prepares it for the use of the body as heat and energy producing material and as material for repair and growth.

The Alimentary Canal
The part of the body that has to do with digesting the food is called the alimentary canal. The alimentary canal is a long tube that reaches from the mouth to the lowerend of the large intestine.
The middle portion of it coiled up.
In an adult this tube is about thirty feet long. The names of the different sections of the alimentary canal are the mouth, cesophagus, stomach, small intestine and large intestine.