Circle of Willis is the anastomoses of arteries present at the base of the brain. It is made up of following arteries: Left and right Anterior cerebral artery Left and right internal carotid artery Anterior communicating artery Left and right posterior cerebral artery Left and right posterior communicating artery Picture credit: @hidocdr (Instagram) https://www.instagram.com/p/CQZHx9chCMO/?utm_medium=copy_link