Question

what prevents the backflow of blood inside the heart during contraction ?

a) valves in heart
b) thin walls of atria
c) thick muscular walls of ventricles
d) All of the above​

Answer 1

A) Valves in heart..........

Answer 2

Answer:

options a

Explanation:

As the heart pumps blood, a series of valves open and close tightly. These valves ensure that blood flows in only one direction, preventing backflow. The tricuspid valve is situated between the right atrium and right ventricle.

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