Concept:The alimentary canal is the continuous tube through which food passes, from the mouth to the anus.
Organs that only secrete digestive juices, but do not carry food, are accessory organs.
Explanation:The alimentary canal includes structures on the food pathway, such as the oesophagus, stomach, small intestine, large intestine, and rectum.
The appendix is a small pouch attached to the large intestine and is considered part of that tract.
The salivary glands, liver, gallbladder, and pancreas are accessory digestive organs.
They release enzymes or other substances into the canal, but food does not travel through them.
Option B contains only structures that belong to the alimentary canal.
Answer:B. Large intestine, appendix, and rectum.