this image shows what is called circulus of wiilis
arteries that are connected together in the form of a circle placed just under the two cerbri just above the pituitary gland
showing:
1. internal carotid artery
2. vertebral artery
3. posterior inferior cerebellar artery
4. superior cerebellar artery
5. post. cerebral artery
6. post. communicating artery
7. middle cerebral artery
8. basilar artery
9. ant. cerebral artery
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