The word is lumen. It means the interior of a hollow tubular structure such as the intestine.
a hollow intestine
the long intestine and the shorter intestine
The small intestine is, indeed, hollow running 20 feet.
Walls of hollow visceral organs such as your intestines.
That tree is hollow. Do you have a hollow leg? I'm going to hollow out a hole.
The word 'hollow' can function as both an adjective and a noun.
The hole in the tree was hollow.
The Latin word cavare means "to hollow; to hollow out" which comes from the Latin word for cave, cavus.
Yes, it can be (a hollow sphere, a hollow sound). The word hollow can also be a noun, meaning a gap, void, or a small valley.
What is the hollow? Jaw House
Yes, a sentence can be ended with the word hollow. "The manner in which his family treated his new wife left him feeling hollow." "The manner in which her family treated her new husband left her feeling hollow."
Colon is another word for the large intestine