catheter
Eustacian tube
trachea .
the "tube" that connects the mouth and the stomach is called the esophagus.
euthasian tube
The blue tube.
A tube that connects the mouth to your stomach
The ureter is a "tube" that connects the kidney to the bladder.
Bile duct is the tube which connects liver to the alimentary canal
two tubes that connect the trachea and to bronchioles
The body tube is a tube that connects the eyepiece (or ocular) and the nosepiece.
If by "food tube" you mean the tube that connects the mouth to the stomach, it is commonly known as the gullet, the scientific name being the "oesophagus" (English) or "esophagus" (American).Esophagus
The vas deferens connects the epididymis and the urethra.