This model consists of the skull and 7 cervical vertebrae, with the cervical vertebral artery, with a base, as well as display the posterior brain, spinal cord, cervical nerve, vertebral ertery,basilar artery and posterior cerebral artery, and on this basis,there are 8 sets of cerebral artery models, which can be divided into anterior lobe and parietal lobe, temporal lobe and occipital lobe, Brain stem and cerebellum.