Anatomy and Physiology II Practice Test

The valve located between the right atrium and right ventricle is known as the tricuspid atrioventricular (AV) valve. This structure is named "tricuspid" because it typically has three leaflets or cusps that facilitate the flow of blood from the right atrium into the right ventricle during diastole, when the heart is filling with blood. The primary function of this valve is to prevent the backflow of blood into the atrium when the ventricle contracts during systole, ensuring that blood flows efficiently towards the lungs for oxygenation.

In contrast, the other options refer to different heart valves with distinct locations and functions. The pulmonary valve is situated between the right ventricle and the pulmonary artery, controlling blood flow to the lungs. The bicuspid valve, also known as the mitral valve, is located between the left atrium and left ventricle, composed of two cusps. Lastly, the aortic valve regulates blood flow from the left ventricle into the aorta, ensuring blood moves into the systemic circulation. Each valve plays a crucial role in the overall cardiac cycle, but the specific location of the tricuspid valve makes it the correct answer in this context.