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

Arteries

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Veins

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Valves

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Capillaries

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Solution

The correct option is C Valves
Valves prevent backflow of blood from ventricles to atria when ventricles contract and from the blood vessels to the ventricles when the ventricles relax. Valves are also present in the veins to prevent the backflow of blood and ensure blood flow only towards the heart.

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

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

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