Question

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what is role of valves in heart and veins

Answer 1

The valves prevent the back flow of blood. Veins carry de oxygenated blood. To prevent the back flow of blood in veins. If there is a back flow in the heart there may be many problems occurring.

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Answer 2

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.