why does the heart need valves
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Explanation:
The valves keep the blood going in one direction that keeps the body stable.
The valves prevent the backward flow of blood.
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Answer:
The valves prevent the backward flow of blood. These valves are actual flaps that are located on each end of the two ventricles (lower chambers of the heart). They act as one-way inlets of blood on one side of a ventricle and one-way outlets of blood on the other side of a ventricle.
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