Alimentary tract, also called as alimentary canal,digestive tract/tube, gastrointestinal tract is a hollow passageway of;mucous membrane and muscles that function in digestion. The alimentary canal consists of the mouth,esophagus stomach, small intestine,large intestine, and anus.Metabolism is a biochemical reaction and physical procedure that encompasses maintenance of various functions, such as breathing, blood circulation, muscles movement, digestion of food and nutrients, waste elimination, body temperature control, and proper functioning of brain and nerves of the organism. Metabolism is a pathway that starts with a series of biochemical reactions with a specific molecule and ends with a product with the help of specific enzyme. It is categorized into two processes, i.e. catabolism and anabolism. Catabolism involves breaking down of molecules into simpler energy yielding forms while anabolism involves synthesis of compounds or elements needed by the cell for proper functions.