Which valves are categorized as AV nodes?

The correct identification of the valves categorized as atrioventricular (AV) valves is indeed the mitral and tricuspid valves. AV valves are crucial structures located between the atria and the ventricles of the heart. Their primary function is to prevent the backflow of blood from the ventricles into the atria during ventricular contraction (systole).

The mitral valve, situated between the left atrium and left ventricle, ensures that oxygenated blood flows in one direction from the lungs to the body. The tricuspid valve serves a similar function on the right side of the heart, between the right atrium and right ventricle, managing the flow of deoxygenated blood from the body to the lungs for reoxygenation.

Recognizing the specific functions of these valves is essential because they help maintain the efficiency of the heart's pumping action and contribute to the overall hemodynamics of the circulatory system. The other options listed consist of valves that are not classified as AV valves, such as the pulmonic and aortic valves, which are semilunar valves, serving to direct blood flow out of the heart into the pulmonary artery and aorta, respectively. Understanding this distinction is critical for any healthcare professional working with