Question

What would pass through the lumen of the esophagus?

Answer 1

A bolus (clump of swallowed food) would pass through the lumen.

What is the function of the lumen in the oesophagus?

The oesophagus has upper and lowers oesophageal sphincters at the proximal and distal ends, which contain the retrograde movement of food by tightening and sealing the lumen of the oesophagus. During swallowing, these sphincters relax to allow forward passage of food.

Thus, A bolus would pass through the lumen.

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