What are the pulmonic and aortic valves classified as?

The pulmonic and aortic valves are classified as semilunar valves due to their crescent or half-moon shape. These valves are located at the exits of the right and left ventricles, respectively, and their primary function is to prevent the backflow of blood into the heart after it has been pumped out into the pulmonary artery and aorta.

Semilunar valves open when the ventricles contract, allowing blood to flow out, and close when the ventricles relax, ensuring unidirectional blood flow. This is crucial for maintaining efficient circulation within the body and preventing regurgitation of blood back into the heart during the filling phase of the cardiac cycle.

Chamber valves, atrioventricular valves, and inlet valves refer to different classifications and functions of heart valves. For instance, atrioventricular valves, which include the tricuspid and mitral valves, are situated between the atria and ventricles and function differently than the semilunar valves.