− | The [[#Vasculature|blood supply to the brain]] has major differences depending on species. Across all species, there are four 4 potential channels to facilitate blood supply to the Circle of Willis. These are; | + | The [[#Vasculature|blood supply to the brain]] has major differences depending on species. Across all species, there are variations in four major potential channels to facilitate blood supply to the Circle of Willis. As mentioned above, these are; |