Which part of the cardiovascular system receives deoxygenated blood?

The right atrium is responsible for receiving deoxygenated blood in the cardiovascular system. This blood comes from the body's tissues via the superior and inferior vena cavae, which are large veins that return blood to the heart. Once the deoxygenated blood enters the right atrium, it is then pushed into the right ventricle, from where it will be sent to the lungs for oxygenation.

In contrast, the left atrium receives oxygenated blood coming from the lungs through the pulmonary veins. The left ventricle then pumps this oxygen-rich blood out to the rest of the body. The right ventricle is involved in routing the deoxygenated blood to the lungs, but it does not receive the blood directly; that task belongs to the right atrium. This functional organization is essential for maintaining efficient blood circulation throughout the body.