Which term refers to the depth or space inside a hollow organ?

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Multiple Choice

Which term refers to the depth or space inside a hollow organ?

Explanation:
The interior space inside a hollow organ is called the lumen. It’s the channel through which contents move, such as blood in a vessel or food in the GI tract, and it specifically refers to that hollow-space concept described in the question. The other terms don’t fit: goniometry measures joint angles, diastole is the heart’s relaxation phase, and palpitation is a sensation of heartbeat. So lumen is the best fit.

The interior space inside a hollow organ is called the lumen. It’s the channel through which contents move, such as blood in a vessel or food in the GI tract, and it specifically refers to that hollow-space concept described in the question. The other terms don’t fit: goniometry measures joint angles, diastole is the heart’s relaxation phase, and palpitation is a sensation of heartbeat. So lumen is the best fit.

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