The only way to find out if the card is First Edition or not, is to look at the middle left of your card, if it is in the older set. If you noticed, the card on the left has a 1st edition stamp on it.
From Wikipedia, the free encyclopedia. In human anatomy, the left and right posterior communicating arteries are arteries at the base of the brain that form part of the circle of Willis. Each posterior communicating artery connects the three cerebral arteries of the same side.he brain is supplied with blood by the internal carotid arteries and also by the posterior cerebral arteries; the posterior communicating arteries connects the two systems. This provides redundancies or collaterals in the cerebral circulation so that, if one system is blocked or narrowed, the other can take over.
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. Stroke: A sudden blood clot in the carotid artery can interrupt blood flow to the brain, causing a stroke. 2  Fragments of cholesterol plaque in the carotid artery may also travel into the brain to cause a stroke.