Which organ is an accessory organ of the digestive system?

• A. Pancreas
• B. Liver
• C. Teeth
• D. Gallbladder

Answer: (C)

The main idea is that accessory organs help digestion without being part of the main digestive tube. Teeth are an accessory organ because they perform mechanical digestion in the mouth by chewing food into smaller pieces, preparing it for chemical digestion. The pancreas, liver, and gallbladder are all involved in digestion by producing or storing digestive secretions—enzymes and bile—rather than aiding breaking down food through chewing, so they’re functioning differently as glands rather than the chewing-related role highlighted here. Thus, teeth best fit the description of an accessory organ that directly assists digestion through mechanical processing.