What are the four chambers of the heart?

The four chambers of the heart include the right atrium, right ventricle, left atrium, and left ventricle. The heart is a muscular organ that functions as the body's pump to circulate blood throughout the body.

The right atrium receives deoxygenated blood from the body through the superior and inferior vena cavae and then pumps it into the right ventricle. The right ventricle is responsible for sending this deoxygenated blood to the lungs via the pulmonary artery for oxygenation. Conversely, the left atrium receives oxygenated blood from the lungs through the pulmonary veins and passes it into the left ventricle. The left ventricle then pumps the oxygen-rich blood into the aorta, distributing it to the rest of the body.

Understanding the structure and function of each chamber is essential for recognizing how blood flow occurs within the heart, which is foundational knowledge in anatomy and physiology relevant to health and fitness practices. The other options do not correctly comprise all four chambers, mixing in other vessels that do not serve as chambers of the heart.