Which of the following organs is not part of the alimentary canal?

The alimentary canal of the body consists of the organs through which food passes. Namely, these organs are the mouth, pharynx, esophagus, stomach, small intestine, large intestine and the rectum. The organs are listed in order by which food passes through them.

Other organs work in conjunction with these organs to assist the digestion of foods. For example, the liver, gall bladder and pancreas all provide substances such as enzymes to help digest the food that is present in the alimentary canal, but they themselves are not part of the canal.