Circle of Willis Sources — FRCA Primary MCQ

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EasyAnatomyCircle of Willis SourcesFRCA Primary

The circle of Willis receives contributions from which two arterial systems?

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Correct answer: D — Internal carotid and vertebrobasilar

The circle of Willis is formed by internal carotid (anterior circulation) and vertebrobasilar (posterior circulation) contributions: anterior communicating artery / paired ACA / paired ICA / paired posterior communicating / paired PCA.

Reference: RCoA 2021 Primary FRCA Curriculum