_______ are present to prevent backflow of blood in the heart.

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Solution

Valves prevent backflow of blood from ventricles to atria when ventricles contract, and from the blood vessels to the ventricles when the ventricles relax.

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Similar questions

___ are present to prevent backflow of blood in the heart.

________ are present to prevent backflow of blood in the heart.

Valves are present to prevent backflow of blood in the heart.

Valves prevent backflow of blood inside the heart during contraction.

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