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.
Arteries are vessels that carry blood away from the heart. The carotid arteries are blood vessels that supply blood to the head, neck and brain. One carotid artery is position on each side of the neck. The right common carotid artery branches from the brachiocephalic artery and extends up the right side of the neck. The left common carotid artery branches from the aorta and extends up the left side of the neck.