Which of the following parts is the lumen of the GI tract?

Question

Quizplus · Accepted Answer

The lumen refers to the inner space within a tubular structure. In the context of the GI tract, the lumen is the space within the tube that runs from the mouth to the anus. Therefore, the correct answer is C, the inner space of the GI tract. The epiglottis is a flap of cartilage that prevents food from entering the trachea during swallowing, not part of the lumen. Capillaries are small blood vessels that supply the tissues within the GI tract but are not part of the lumen itself. The mucosal surface refers to the inner lining of the GI tract, which comes into contact with the lumen.

Which of the Following Parts Is the Lumen of the GI