Biology, asked by rahulkatariya976, 11 months ago

7. What prevents backflow of blood inside the heart during contraction?
(a) Valves in heart
(b) Thick muscular walls of ventricles
(c) Thin walls of atria
(d) All of the above

Answers

Answered by Ldutta1982

Answer:

(a) valves in the heart

Given below is the reference from NCERT textbook.

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Answered by vishnuprada6934

Answer:

potion (A) valves in heart

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7. What prevents backflow of blood inside the heart during contraction?(a) Valves in heart(b) Thick muscular walls of ventricles(c) Thin walls of atria(d) All of the above​

Answers

7. What prevents backflow of blood inside the heart during contraction?
(a) Valves in heart
(b) Thick muscular walls of ventricles
(c) Thin walls of atria
(d) All of the above