Which of the following is NOT an accessory organ?

• A. Liver
• B. Stomach
• C. Tongue
• D. Gallbladder

Answer: (B)

The main idea is that accessory organs support digestion but aren’t part of the digestive tract itself. The liver and gallbladder fit this role: they’re separate organs that produce and store bile to aid digestion, without being the tube through which food travels. The tongue also functions to process food—tasting, maneuvering, and aiding swallowing—and is commonly treated as an accessory digestive organ because its role is to assist digestion rather than form part of the digestive tract. The stomach, however, is a primary component of the digestive tract itself—the first major organ where food is chemically and mechanically broken down as it passes through the alimentary canal. Because of that, the stomach is not an accessory organ.