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trachea
trachea
An abnormal narrowing of a tube or passageway.
Another word for bronchi is bronchial tube.
The process of removing a tube from a hollow organ or passageway
The one word synonym for "underground passageway" is "tunnel".
Straw
The oviducts
The tube is the urethra, which carries urine from the bladder.(Should not be confused with the ureter, a tube that connects the kidneys to the bladder.)
Passage.
Anal Fistula
The esophagus is the tube from pharynx to stomach.