The empty space inside a tube is called the lumen. It is the hollow part through which fluid or air can flow.
He ate applesauce out of a toothpaste like tube.
The tube that leads to the bladder is called the ureter.
It is called "Space" ... a descriptive title suggestive of the vast volumes of nothingness or 'space' so ubiquitously and homogeneously distributed there.
People who travel in space are called astronauts.
A person who flies in space is called an astronaut.
Spacesuits include a bag with a tube called a catheter.
The space within a tube-like structure is called a lumen. Parts of the body with lumens include veins and arteries.
A telescope
The inflammation of the eustachian tube is called eustachian tube dysfunction (ETD).
another name for test tube is culture tube or sample tube
pureed goo in a tube resembling a toothpaste tube.
The 'tube'
The tunnel is called a lava tube or magma tube.It's called a conduit.conduita tube or vent tube
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tube à essai
the largest test tube is beaker
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