Final answer:
The correct option is D. Tricuspid. The valve between the right atrium and right ventricle is known as the tricuspid valve, which has three flaps to prevent the backflow of blood. To answer the student's question, the correct choice is D. Tricuspid.
Step-by-step explanation:
The valve located between the right atrium and the right ventricle in the human heart is known as the tricuspid valve. It is one of the two atrioventricular valves, which function as one-way valves to facilitate the proper flow of blood between the upper chambers (atria) and the lower chambers (ventricles) of the heart. The tricuspid valve typically consists of three flaps, or leaflets, that are secured by connective tissue called chordae tendineae to papillary muscles, helping to prevent the backflow of blood.
On the other side of the heart, the corresponding valve between the left atrium and left ventricle is called the mitral valve, also known as the bicuspid valve. This valve is structurally comprised of two cusps, contrasting the three cusps found in the tricuspid valve.