CVS Practice Test 2026 - Free CVS Practice Questions and Study Guide

The right coronary artery (RCA) primarily functions to supply blood to the interatrial septum, right atrium, and right ventricle. This is significant because the right atrium receives deoxygenated blood from the body and directs it into the right ventricle, which then pumps it to the lungs for oxygenation. The RCA is crucial for maintaining the perfusion of these cardiac structures, ensuring that the heart can effectively function and support overall circulatory needs.

In contrast, the other options reference functions that do not align with the RCA's primary responsibilities. For example, supplying blood to the lungs is primarily the role of the pulmonary arteries, while the left ventricle receives its blood supply mainly from the left coronary artery. The ascending aorta is not directly supplied by the RCA, as it branches off from the left ventricle. Understanding the specific vascular anatomy and blood supply of the heart is vital for comprehending cardiac function and pathology.