The term 'tube' can refer to a variety of objects, including a TUNNEL (6 letters), ARTERY (6 letters), CONDUIT (7 letters), PASSAGE (7 letters), HOSE (4 letters), CYLINDER (8 letters), PIPE (4 letters), DUCT (4 letters), vas (3 letters), YOU (3 letters), BOOB (4 letters), INNER (5 letters), TVset (5 letters), and teevee (6 letters). A TUNNEL is an underground passageway, while an ARTERY is a blood vessel that carries oxygen-rich blood from the heart to the body. A CONDUIT is a tube or PIPE used to carry fluids, while a PASSAGE is a way through which something can pass. A HOSE is a flexible tube used to convey liquids, while a CYLINDER is a solid or hollow object with a circular cross-section. A PIPE is a tube used to convey water, gas, or other fluid substances, while a DUCT is a tube or passageway used to convey air, gas, or liquid. A vas is a tube or vessel in the body, while YOU is a pronoun used to refer to the person being addressed. BOOB is a slang term for a woman's breast, while INNER is located within or inside something. TVset is a television set, while teevee is a slang term for television.