Deoxygenated blood returns to which chamber of the heart?

Deoxygenated blood returns to the right atrium of the heart. This is a critical component of the circulatory system. Blood that has circulated through the body delivers oxygen to tissues and collects carbon dioxide and other waste products. This deoxygenated blood is then transported back to the heart through two large veins called the superior and inferior vena cavae.

Once the deoxygenated blood enters the right atrium, it is then directed into the right ventricle, from where it will be pumped to the lungs for oxygenation. The right atrium serves as a receiving chamber for blood returning from the systemic circulation, making it essential for the heart's function in maintaining a continuous flow of blood throughout the body.

In contrast, the left atrium receives oxygenated blood from the lungs, while the left ventricle is responsible for pumping oxygenated blood to the body. The right ventricle, though it plays a part in the circulation of deoxygenated blood, does so after it has already entered the right atrium. Hence, the right atrium is the correct chamber for deoxygenated blood return.