If you are planning a hard-to-get Alcatraz tour, you will need to really layer clothes for a variety of temperatures. The weather varies greatly from month to month and hour to hour. Even the neighborhood youre in makes a difference. For many visitors, the San Francisco weather can be counter-intuitive.
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: 1  The internal carotid artery supplies blood to the brain.
arteria; arterial blood vessel; artery (a blood vessel that carries blood from the heart to the body). Hyponyms (each of the following is a kind of carotid artery): common carotid; common carotid artery (runs upward in the neck and divides into the external and internal carotid arteries). external carotid; external carotid artery (the branch of the carotid artery that supplies blood to the face and tongue and external parts of the head). internal carotid artery (the branch of the carotid artery that supplies blood to the brain and eyes and internal parts of the head).