In human heart's right atrium communicates with the right ventricle through:

Explanation

Option C is correct.In the human heart, the right atrium communicates with the right ventricle through the tricuspid valve. The tricuspid valve is a one-way valve that prevents blood from flowing back from the right ventricle to the right atrium. It is made up of three thin cusps (flaps) that are attached to chordae tendineae (tendinous cords). The chordae tendineae are attached to the papillary muscles, which are small muscles located on the inner walls of the right ventricle. When the right atrium contracts, it forces blood through the open tricuspid valve into the right ventricle. When the right ventricle contracts, it closes the tricuspid valve to prevent blood from flowing back into the right atrium. The other options are not structures that connect the right atrium to the right ventricle: The interatrial septum is a wall that separates the right atrium from the left atrium. The ventricular septum is a wall that separates the right ventricle from the left ventricle. The bicuspid valve, also known as the mitral valve, is a valve that connects the left atrium to the left ventricle.