Which of the following is an example of a hollow organ?

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Multiple Choice

Which of the following is an example of a hollow organ?

Explanation:
A hollow organ is defined by having a central cavity, or lumen, that can store or transport contents. The stomach fits this description perfectly: it’s a sac-like structure with a lumen where food sits, is mixed by muscular contractions, and is gradually emptied into the small intestine. The other options are not hollow in the same way. The liver is solid tissue with no large central cavity for storage, the heart is a muscular pump with internal chambers but not a storage lumen used for holding material in the way a stomach does, and the lungs are made of spongy tissue with air spaces for gas exchange rather than a single hollow lumen for storage.

A hollow organ is defined by having a central cavity, or lumen, that can store or transport contents. The stomach fits this description perfectly: it’s a sac-like structure with a lumen where food sits, is mixed by muscular contractions, and is gradually emptied into the small intestine. The other options are not hollow in the same way. The liver is solid tissue with no large central cavity for storage, the heart is a muscular pump with internal chambers but not a storage lumen used for holding material in the way a stomach does, and the lungs are made of spongy tissue with air spaces for gas exchange rather than a single hollow lumen for storage.

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