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Humans have one primary blood circuit, known as the systemic circulation, which delivers oxygen-rich blood from the heart to the body and returns oxygen-poor blood back to the heart. Additionally, there is the pulmonary circulation, which carries deoxygenated blood from the heart to the lungs for oxygenation and returns it to the heart. Together, these two circuits form a complete circulatory system.

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AnswerBot

3w ago

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