Final answer:
The right AV valve referred to in the question is the tricuspid valve, which is located between the right atrium and the right ventricle of the heart.
Step-by-step explanation:
The right AV valve is known as the tricuspid valve. It is one of the four main valves of the heart. The other valves include the pulmonary semilunar valve, the aortic semilunar valve, and the bicuspid (mitral) valve. Both the aortic and the pulmonary valves are considered semilunar valves, while the tricuspid and mitral valves are known as atrioventricular valves, or AV valves. The tricuspid valve is specifically located between the right atrium and the right ventricle, preventing backflow of blood as it moves from the atrium to the ventricle.