Question

c. What prevents the backflow of blood during contraction:
(i) Valves
(ii) Muscles of the ventricles
(iii) Thin walls of the atria
(iv) All the above​

Answer 1

Answer:

Valves maintain direction of blood flow

These valves ensure that blood flows in only one direction, preventing backflow. The tricuspid valve is situated between the right atrium and right ventricle. The pulmonary valve is between the right ventricle and the pulmonary artery.