CVS Practice Test 2025 - Free CVS Practice Questions and Study Guide

The two types of heart valves are classified as atrioventricular and semilunar valves. Atrioventricular valves are located between the atria and ventricles of the heart. They include the tricuspid valve on the right side and the mitral (or bicuspid) valve on the left side. These valves play a crucial role in ensuring that blood flow moves in one direction—from the atria to the ventricles—preventing backflow during contraction.

Semilunar valves, on the other hand, are found at the exits of the ventricles where they lead into the pulmonary artery and the aorta. These valves, specifically the pulmonary valve and the aortic valve, prevent blood from flowing back into the ventricles after it has been pumped out.

This classification directly describes the functional and anatomical differences between the heart valves, focusing on their placement and role in the circulation of blood, which makes it the correct choice. The other options do not accurately represent the primary classifications of heart valves in terms of their anatomical structure and function.