Question 18 - MCQs from NCERT Exemplar - Chapter 6 Class 10 - Life Processes

Last updated at July 14, 2026 by

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

 

Answer

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

valves prevent the back flow of blood by opening and closing tightly to guide the flow of blood in specific directions-01.jpg



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