Is a tube that runs through the whole body, that digests food to extract energy and nutrients. Then this, ejects the remaining residue.

Absortion:the movement of small food molecules and ions through a wall in the intestine into the blood.

Assimilation: the movement of digsted food molecules into the cells of the body where they are used to become part of the cell.

Egestion: the passing out of food that hasn't been digested or absorbed as faces through the anus.

Ingestion: Is the process of taking of substances such as food and drink into the body through the mouth.

Mechanical digestion: large pieces of food are broken down into smaller pieces, that involves a physical process that is chewing

Chemical digestion: is the chemical breakdown of food, due to enzymes secreted in the mouth, stomach and intestines.