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.
Carotid artery disease is a serious condition that occurs when the blood vessels in the neck that carry oxygen-rich blood to the brain (carotid arteries) become narrowed a fatty, waxy substance called plaque.Carotid artery disease is one of the primary causes of a stroke.These blockages caused by carotid artery disease can restrict blood flow to brain tissue or promote a blood clot that cuts off blood flow entirely, causing an ischemic stroke ,the most common type of stroke.Identifying and treating carotid artery disease is critical in reducing the risk of a first or recurrent stroke.hese blockages caused by carotid artery disease can restrict blood flow to brain tissue or promote a blood clot that cuts off blood flow entirely, causing an ischemic stroke ,the most common type of stroke. Identifying and treating carotid artery disease is critical in reducing the risk of a first or recurrent stroke.