Which would be considered a hollow organ?

• A. Liver
• B. Heart
• C. Intestines
• D. Lungs

Answer: (C)

A hollow organ is a structure that has a central lumen or cavity that can contain and transport contents. The intestines fit this description: they are long tubular organs with a lumen through which digested material moves and is processed. That makes them a clear example of a hollow organ.

The other options don’t fit as hollow organs in this context. The liver is a solid mass of tissue without a central cavity to hold material. The heart is a muscular pump with chambers, but it’s not considered a hollow organ in the same way a tube with a lumen is. The lungs are composed of spongy tissue and air spaces, designed for gas exchange rather than serving as a simple hollow conduit.