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.
According to FitzGerald, 1996, the contralateral internal carotid may use the circle of Willis/anterior communicating artery to supply blood to both pairs of anterior and middle cerebral arteries. Complete interruption of blood flow in the anterior cerebral artery is not very likely because the opposite anterior cerebral can use the anterior communicating artery to make up for the deficiency.