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

The right atrium is the chamber of the heart that receives deoxygenated blood returning from the body. Blood that is low in oxygen and high in carbon dioxide returns to the heart through two large veins known as the superior and inferior venae cavae. These veins deposit the deoxygenated blood into the right atrium.

Once the right atrium fills with blood, it contracts to push the blood into the right ventricle, which then sends it to the lungs for oxygenation. This process is essential for maintaining the oxygen supply to the body, as it enables the removal of carbon dioxide and replenishment of oxygen in the blood.

In comparison, the left atrium collects oxygenated blood from the lungs, while the left ventricle pumps it out to the body. The right ventricle’s role is to direct the deoxygenated blood to the lungs, but it does not receive the blood; that function belongs to the right atrium.