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makkiz [27]
3 years ago
8

Valves in the veins support the theory that: A: blood moves in two directions through the vein, B: movement of blood is back and

forth through the veins, C: blood circulates through the body, D: blood ebbs and flows in one space
Biology
1 answer:
UkoKoshka [18]3 years ago
4 0

Answer:

c

Explanation:

because the blood circulates

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