What Prevents the Backflow of Blood Inside the Heart during contraction (A) Valves in the heart (B) Thick muscular walls of ventricles (C) Thin walls of atria (D) All of the above

Answer: The correct Option is Valves in the heart

During contraction, the walls of the heart are not responsible for preventing the backflow of blood inside the heart.

Tricuspid, pulmonary, aortic, and mitral are the four main valves of the heart. In between the ventricle and right atrium, you’ll find a tricuspid valve. The right ventricle and the pulmonary artery are connected by a pair of pulmonary valves. There is a mitral valve between the left ventricle and the left atrium. The aortic valve is located in the center of the aorta and the left ventricle.