单选题:脑底动脉环在脑循环中起着非常重要的作用,能沟通脑前、后、左、右的血液供应,下列哪条动脉不参与脑底动脉环的组成(  )

题目内容:
脑底动脉环在脑循环中起着非常重要的作用,能沟通脑前、后、左、右的血液供应,下列哪条动脉不参与脑底动脉环的组成(  ) A.大脑前动脉
B.前交通动脉
C.颈内动脉
D.大脑后动脉
E.椎动脉
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