CVS Practice Test 2026 – The All-In-One Guide to Exam Success!

The statement that the right atrium contains the fossa ovalis is true because the fossa ovalis is an important anatomical feature located within the right atrium. It is a remnant of the foramen ovale, which is a small opening that allows blood to bypass the non-functioning fetal lungs during development. After birth, this opening typically closes, leaving behind the fossa ovalis as a noticeable depression in the interatrial septum of the right atrium.

Understanding the anatomical features of the heart, including the right atrium, is critical for recognizing how the heart functions to circulate blood. In contrast, the other options include incorrect associations about the right atrium's structure and function. For instance, the walls of the left atrium are actually thicker than those of the right atrium, as the left atrium is responsible for receiving blood from the pulmonary veins and managing higher pressure. The assertion that the right atrium serves only as a passageway for oxygenated blood is misleading since it primarily receives deoxygenated blood from the body. Additionally, while the right atrium does play a role in directing blood towards the right ventricle, it does not pump blood to the lungs directly; that function is performed by the right