Which part of the heart receives deoxygenated blood coming from the body?

The right atrium is responsible for receiving deoxygenated blood from the body. Blood that has circulated through the body delivers oxygen to the tissues and collects carbon dioxide as a waste product. This deoxygenated blood returns to the heart via the superior and inferior vena cavae, which empty into the right atrium.

Once the right atrium fills with deoxygenated blood, it contracts and sends the blood into the right ventricle, which then pumps it to the lungs for reoxygenation. Understanding this flow of blood through the heart is essential for grasping the heart's overall function in the circulatory system. Other parts of the heart, such as the left atrium and left ventricle, handle oxygenated blood after it has returned from the lungs, while the right ventricle pumps deoxygenated blood to the lungs. Therefore, identifying the right atrium as the recipient of deoxygenated blood is crucial for understanding cardiac physiology.