Blood supply to the brain is normally divided into anterior and posterior segments, relating to the different arteries that supply the brain. The two main pairs of arteries are the Internal carotid arteries (supply the anterior brain) and vertebral arteries (supplying the brainstem and posterior brain). The circle of Willis is a circulatory anastomosis that supplies blood to the brain and surrounding structures.
The circle of Willis is a part of the cerebral circulation and is composed of these arteries:
● Anterior cerebral artery (left and right)
● Anterior communicating artery
● Internal carotid artery (left and right)
● Posterior cerebral artery (left and right)
● Posterior communicating artery (left and right)Medical_doctors Channel