What part of the heart receives venous blood?

The right atrium is the part of the heart that receives venous blood, specifically deoxygenated blood from the body. It collects blood returning from the systemic circulation through the superior and inferior vena cavae, which are the large veins that transport the blood back to the heart after it has circulated through the body's tissues. Once the right atrium fills with blood, it contracts and sends the blood into the right ventricle, which will then pump it to the lungs for oxygenation through the pulmonary artery.

In contrast, the left ventricle is responsible for pumping oxygenated blood out to the body, while the pulmonary veins carry oxygenated blood from the lungs to the left atrium. The left atrium, like the right atrium, serves as a receiving chamber, but it specifically receives oxygenated blood from the pulmonary circulation rather than venous blood from the body. Thus, the right atrium's role in accepting venous blood makes it the correct answer for this question.