<Tr> <Th> FMA </Th> <Td> 50454 </Td> </Tr> <Tr> <Td_colspan="2"> Anatomical terminology (edit on Wikidata) </Td> </Tr> <P> The circle of Willis (also called Willis' circle, loop of Willis, cerebral arterial circle, and Willis polygon) is a circulatory anastomosis that supplies blood to the brain and surrounding structures . It is named after Thomas Willis (1621--1675), an English physician . </P> <P> The circle of Willis is a part of the cerebral circulation and is composed of the following arteries: </P>

Where does the circle of willis supply blood to