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A-Level Biology OCR A

Blood Circulation Double Circulatory Pumped Heart Define System

Front Define double circulatory system.
Back Double circulatory system - blood passes through the heart twice in each circulation and there are two separate circuits:
  • In first circulation deoxygenated blood is pumped by the heart to the lungs
  • In the second circulation oxygenated blood is pumped by the heart to the rest of the body

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