Other English forms include the shortening Retha, and the spelling variant Areta. Variant forms of Aretha used in other languages include the Latinized Arethusa and the French Arette. Aretha is rare as a baby name for girls.
Circle of Willis Arteries. 1  anterior cerebral artery. 2  internal carotid artery. 3  posterior communicating artery. 4  posterior cerebral artery. 5  basilar artery. 6  middle cerebral artery. 7  anterior communicating artery (minute connection between the left and right anterior cerebral arteries).
arterial blood pressure. see blood pressure. cerebral arterial circle. arterial circle created by the conjunction of the caudal communicating artery and the rostral cerebral artery. It encircles the optic chiasma and the hypophysis. Called also the circle of Willis.