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GCSE Biology · key term
A system in which blood passes through the heart twice during one complete journey around the body: once on its way to the lungs and once on its way to the rest of the body.
Used by AQA and OCR
Specification 4.2.2.2 · Paper 1
Revise: The Heart, Double Circulation and the PacemakerThe right and left sides handle different journeys, so blood passes through the heart twice in one complete circuit: this is a double circulatory system.
Specification B2.2c · Paper 1 (Foundation), Paper 3 (Higher)
A circulation in which blood passes through the heart twice during one complete journey around the body.
Revise: Human circulatory systemHumans have a double circulatory system, made from two connected loops.
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