Which combination of organs is hollow?

Which combination of organs is hollow?

• A. Esophagus and trachea.
• B. Esophagus and stomach.
• C. Stomach and gallbladder.
• D. Liver and pancreas.

Answer: (C)

Hollow organs have a lumen, an interior space that can hold contents or substances. The stomach is a hollow organ of the digestive system with a lumen where food mixes and passes through. The gallbladder is a hollow sac that stores bile and has a lumen that can expand as it fills. Because both organs in this pair possess a true internal cavity, they illustrate the concept of hollow organs clearly. The liver and pancreas, by contrast, are solid glands without a major lumen in their main tissue, so they aren’t hollow. (Esophagus and trachea are tubular and hollow too, but this pair most cleanly highlights two hollow organs in the context given.)

Hollow organs have a lumen, an interior space that can hold contents or substances. The stomach is a hollow organ of the digestive system with a lumen where food mixes and passes through. The gallbladder is a hollow sac that stores bile and has a lumen that can expand as it fills. Because both organs in this pair possess a true internal cavity, they illustrate the concept of hollow organs clearly. The liver and pancreas, by contrast, are solid glands without a major lumen in their main tissue, so they aren’t hollow. (Esophagus and trachea are tubular and hollow too, but this pair most cleanly highlights two hollow organs in the context given.)