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2.2.2 The heart and blood vessels
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The heart drives a double circulation

The heart drives a double circulation

Human double circulatory system showing the pulmonary loop between the heart and lungs and the systemic loop between the heart and body organs

The heart is a muscular organ that works as two pumps side by side. In a double circulatory system, blood passes through the heart twice during one complete circuit of the body.

2.2.2 The heart and blood vessels Lesson

  1. GCSE
  2. /Biology
  3. /2.2.2 The heart and blood vessels

Step-by-step lessons on AQA GCSE Biology 2.2.2 The heart and blood vessels. Each one builds up to exam-style questions. Start with the foundational topics and build up to the higher-tier material.

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