Biology, asked by rahulkatariya976, 8 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
2

Answer:

(a) valves in the heart

Given below is the reference from NCERT textbook.

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Attachments:
Answered by vishnuprada6934
0

Answer:

potion (A) valves in heart

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