In preparing this work, we addressed the knowledge about the Cerebral Arterial Circle. We can observe the importance of this anatomical structure, as the circle is the main site of blood supply to the brain. Due to the significance of these vessels, we conducted a study on them that allowed us to assess their magnitude and better understand this anastomosis. This polygon is an anatomical structure consisting of nine arteries that form a heptagon in the brain. The brain is the upper part of the central nervous system and is composed of the cerebrum, cerebellum, and brainstem. The human brain is a complex and extensive organ. It is immobile and has a very high consumption of oxygen and glucose, as the nervous system is made up of highly specialized structures that require a permanent and substantial supply for the proper functioning of its metabolism.