Here is an contrasted MRI showing the origin & length of the carotid arteries. The carotid arteries are major blood vessels in the neck that supply blood to the brain, neck, and face. There are two carotid arteries, one on the right and one on the left. In the neck, each carotid artery branches into two divisions, internal & external carotid arteries. - Mention your friends to see this Follow us @medshots for more