Blood Supply of Brain
Arteries of brain:
The main arteries supplying the brain are the two internal carotid arteries and the two vertebral arteries. These four arteries anastomose on base of the brain and form the circle of Willis.
Veins of brain:
Veins of brain are different from other veins because they don’t have any muscular tissue in their walls and they are devoid of valves. They emerge from the brain and drain into the cranial venous sinuses. Specific veins for cerebrum, cerebellum and brainstem are present.