Difficulty: Medium
Average Score: 94%
Simulated
The Sinoatrial Node (SA) is located within which of the following heart structures?
Correct answer
C
Rationale
The Sinoatrial (SA) Node, often called the heart's natural pacemaker, is situated within the upper wall of the Right Atrium. It initiates the electrical impulses that regulate the heartbeat. Choices A, B, and D are incorrect because the SA node is not located in the Mitral Valve, Right Ventricle, or Left Atrium. It is specifically positioned in the Right Atrium to coordinate the heart's rhythm and timing.