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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.
The largest artery is the aorta, the main high-pressure pipeline connected to the heart's left ventricle. The aorta branches into a network of smaller arteries that extend throughout the body. The arteries' smaller branches are called arterioles and capillaries.The pulmonary arteries carry oxygen-poor blood from the heart to the lungs under low pressure, making these arteries unique. Coronary artery disease makes a heart attack more likely. 2  Carotid artery disease: Atherosclerosis with narrowing of one or both of the carotid arteries in the neck. 3  Disease of the carotid arteries makes stroke more likely.