Biology
Biology, 24.05.2021 22:50, smithad382

Which of the following is NOT a characteristic of vein. A) Valves prevent backward flow of blood
B) returns blood to the heart
C) Walls are one cell thick
D) contracts to push blood along

answer
Answers: 1

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Which of the following is NOT a characteristic of vein. A) Valves prevent backward flow of blood

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