This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Arteries beneath brain Gray closer. Henry Gray Figura svg The brain and arteries at base of the brain Circle of Willis is formed near center The temporal pole of the cerebrum and portion of the cerebellar hemisphere have been removed on the right side Inferior aspect viewed from below Derivative of Image Gray narrowing labels to