Science, asked by 130030071, 3 months ago

veins have what that prevent the blood from flowing backwards

Answers

Answered by venom2930

4

Answer:

PLS MARK AS THE BRAINLIEST

Explanation:

VALVES ARE PRESENT IN THE VEINS WHICH PREVENT THE BLOOD FROM FLOWING BACKWARDS

Answered by 12342824

1

Answer:

valves

Explanation:

Veins contain a series of one-way valves. As the vein is squeezed, it pushes blood through the valves, which then close to prevent backflow.

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