关于空、回肠动脉分布的叙述哪项错误()

A．肠壁由动脉弓发出的直动脉供血

B．直动脉发自空、回肠动脉的二级动脉弓

C．直动脉与肠管纵轴呈直角分布

D．直动脉彼此吻合不丰富

E．小肠系膜对侧缘肠壁血运更差

相关专题： 动脉弓  

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