What area does the Right Coronary Artery primarily supply?

The Right Coronary Artery (RCA) primarily supplies the inferior wall of the heart, particularly through its branches. The RCA gives rise to the right marginal artery, which supplies the right ventricle, and the posterior descending artery (PDA), which often supplies the inferior wall of the left ventricle as well as the interventricular septum. This blood supply is crucial for the function of the heart, as it ensures that the areas reliant on this artery receive adequate oxygenated blood.

In contrast, other regions of the heart have different arterial sources; for instance, the anterior wall is primarily supplied by the Left Anterior Descending artery (LAD), and the lateral wall is typically supplied by the left circumflex artery. The septum has contributions from both the LAD and the RCA, but it is not predominantly supplied by the RCA as the inferior wall is. Therefore, the RCA's main role in supplying blood to the inferior wall makes that answer the correct one.