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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: The internal carotid artery supplies blood to the brain.
Arteries are blood vessels that carry blood away from the heart to other tissues. These large arteries are under the highest blood pressure and have thick elastic walls. From the large arteries, blood moves into smaller and smaller arteries and then into arterioles, which are less elastic and have more smooth muscle than the large arteries.