English, asked by AmanSomil, 11 months ago

What prevents backflow of blood inside the heart during contraction?
1. Thin walls of atria.
2. Valves in heart.
3. Thick muscular walls of ventricles.

Answers

Answered by Anonymous
18

ANSWER

1. Valves ensure that blood does not flow backwards when the atria or ventricles contract.

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Answered by abdulshuhaib
5

Answer:

THICK MUSCULAR WALLS OF VENTRICLE

Explanation:

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