Which chamber receives systemic venous blood returning to the heart?

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Multiple Choice

Which chamber receives systemic venous blood returning to the heart?

Explanation:
Systemic venous blood returning to the heart first enters the right atrium. Blood from the body travels through the superior and inferior vena cavae and drains into this chamber, which acts as the receiving pool for venous return from the systemic circuit. From the right atrium the blood moves to the right ventricle and then to the lungs for oxygenation. In contrast, the left atrium receives oxygenated blood from the lungs via the pulmonary veins, not blood from systemic circulation. The coronary sinus also feeds into the right atrium, bringing venous blood from the heart muscle itself.

Systemic venous blood returning to the heart first enters the right atrium. Blood from the body travels through the superior and inferior vena cavae and drains into this chamber, which acts as the receiving pool for venous return from the systemic circuit. From the right atrium the blood moves to the right ventricle and then to the lungs for oxygenation. In contrast, the left atrium receives oxygenated blood from the lungs via the pulmonary veins, not blood from systemic circulation. The coronary sinus also feeds into the right atrium, bringing venous blood from the heart muscle itself.

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