Which heart chamber receives oxygenated blood and pumps it to the body?

The left ventricle is responsible for receiving oxygenated blood from the left atrium and pumping it out to the entire body through the aorta. It is the strongest chamber of the heart, designed to generate enough pressure to circulate blood throughout the systemic circulation. This is essential for delivering oxygen and nutrients to tissues and organs.

Other options do have distinct roles within the circulatory system. The right atrium receives deoxygenated blood from the body, while the right ventricle pumps it to the lungs for oxygenation. The left atrium receives oxygenated blood from the lungs but does not pump it to the body; instead, it passes the blood to the left ventricle. Thus, the left ventricle is the correct choice as it directly undertakes the critical function of distributing oxygen-rich blood throughout the body.