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Rainbow Rainbow

Class 10th
Maths
2 years ago

69. What prevents the backflow of blood inside the heart during contraction? (a) thick muscular walls of ventricles (b) valves (c) thin walls of atria (d) all of the above Answer

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Dileep Vishwakarma

2 years ago

Valves are flap-like structures which prevent backflow of blood inside the heart during contraction.

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