2.2.2 The heart and blood vessels
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The heart as a double pump

The heart as a double pump

Labelled diagram of the heart showing double circulation, main chambers, major vessels, and valves

Humans have a double circulatory system, meaning blood passes through the heart twice for each complete circuit of the body. One circuit goes to the lungs for gas exchange, and the other pumps blood to the rest of the body.

2.2.2 The heart and blood vessels Lesson

  1. GCSE
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