Science, asked by vaishnavi8931, 5 months ago

why do veins have the valves ?​

Answers

Answered by skumari62529
2

Explanation:

These valves are what ensure blood flows toward your heart.Vein valves work hard, against gravity, to bring the blood that flowed down via arteries back up to your heart. ... Whenvein valves are not fully open your muscles are at rest.

Answered by soumik860
2

Answer:

To prevent the flow of blood in opposite direction.

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