Why do veins have valves?

To trap pathogens

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To provide substrate from clot formation.

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To prevent backflow of blood.

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To increase the blood pressure.

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Solution

The correct option is C To prevent backflow of blood.
Veins have valves which stop the blood from flowing backward. Compared to the arteries, pressure in the veins is very low. The blood is being pushed through the arteries as the heart squeezes the blood out. This driving force is absent in veins.

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Similar questions

Veins have valves to prevent the backflow of blood because the blood in veins flow ________.

How do veins prevent backflow of blood?

Which of the following help veins to prevent the backflow of blood?

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