Final answer:
The blood vessels that supply the teeth are responsible for irrigating them. The lingual, bucal, and facial arteries are the main suppliers of blood to the teeth. While both the upper and lower arches receive arterial branches, the lower arch receives more than the upper arch.
Step-by-step explanation:
The irrigation of the teeth is provided by the blood vessels. The lingual, bucal, and facial arteries are responsible for supplying blood to the teeth. The branches that penetrate the teeth enter through the neck. Each tooth receives multiple dental branches.
While both the upper and lower arches of teeth receive arterial branches, the teeth in the lower arch receive more arterial branches than those in the upper arch.