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单选题 Compared to veins of upper extremity, veins of lower extremity ( )

A. has more valves and more abundant communication between superficial veins and deep veins

B. has less valves and more abundant communication between superficial veins and deep veins

C. has more valves and less abundant communication between superficial veins and deep veins

D. has less valves and less abundant communication between superficial veins and deep veins

E. has no obvious difference in valve number and communication between superficial veins and deep veins

学科:[智慧共享课]系统解剖学

时间:2024-12-16 07:59:40

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