ANATOMY

Detailed explanation-1: -The pulmonary valve prevents the backflow of deoxygenated blood from the pulmonary artery into the right ventricle while the aortic valve prevents the backflow from aorta into the left ventricle.

Detailed explanation-2: -Pulmonary valve: Allows blood to pass into the pulmonary arteries; prevents blood from flowing back into the right ventricle.

Detailed explanation-3: -The semilunar valves prevent backflow into the ventricles from the aorta and pulmonary arteries. The aortic valve prevents flow from the aorta to the left ventricle and the pulmonary valve prevents flow from the pulmonary artery to the right ventricle.

Detailed explanation-4: -The semilunar valves are located at the connections between the pulmonary artery and the right ventricle, and the aorta and the left ventricle. These valves allow blood to be pumped forward into the arteries, but prevent backflow of blood from the arteries into the ventricles.

Detailed explanation-5: -The atrioventricular valves prevent backflow of blood into the atria during ventricular contraction (systole), and the aortic/pulmonic (semilunar) valves prevent backflow of blood into the ventricles during ventricular relaxation (diastole).