Which artery supplies 70% of brain blood flow?

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Multiple Choice

Which artery supplies 70% of brain blood flow?

Explanation:
Blood flow to the brain is divided into anterior circulation from the internal carotid arteries and posterior circulation from the vertebrobasilar system. About 70% of cerebral perfusion comes from the internal carotid system, primarily via the middle cerebral and anterior cerebral arteries that feed most of the cerebral hemispheres. The posterior circulation, supplied by the vertebral and basilar arteries and their branches, accounts for the remaining ~30%. The external carotid artery mainly supplies facial and scalp tissues, not brain tissue. So the artery delivering roughly 70% of brain blood flow is the internal carotid artery.

Blood flow to the brain is divided into anterior circulation from the internal carotid arteries and posterior circulation from the vertebrobasilar system. About 70% of cerebral perfusion comes from the internal carotid system, primarily via the middle cerebral and anterior cerebral arteries that feed most of the cerebral hemispheres. The posterior circulation, supplied by the vertebral and basilar arteries and their branches, accounts for the remaining ~30%. The external carotid artery mainly supplies facial and scalp tissues, not brain tissue. So the artery delivering roughly 70% of brain blood flow is the internal carotid artery.

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