A tube is a hollow, usually cylindrical body of metal, glass, rubber, or other material, used especially for conveying or containing liquids or gases.
food in a tube
where can I buy a rectal tube for pediatrics
intestine
caca
Large tube weapons such as cannons etc.
A rocket body tube is the center of a rocket; also the piece that holds the rocket together.
A vessel is a ship or boat, or a tube in a body that carries fluids.
The Eustachian tube connects the inner ear with the back of the throat. It occurs in both ears and drains fluids into the esophagus.
Why not just ask us for the definition? A test tube baby is one that results from what is known as in vitro fertilization, which is to say, fertilization performed in a laboratory in glassware such as a test tube, rather than in the more familiar way by sexual intercourse.
A hollow cylinder. Also a nickname for the London Underground.
Body tube is a component of a microscope; he separates the eypiece from the objective.
Vein-1 type of vessel,a tube that carries deoxygenated blood,co2,and wastes back to the heart