# Heart Structure & Double Circulation

Describe the structure of the heart (four chambers, valves, coronary arteries) and explain how it pumps deoxygenated blood to the lungs and oxygenated blood to the body in a double circulatory system

Builds on: The Circulatory System (hard, https://ai.page/c/the-circulatory-system/en.md), Gas Exchange & Breathing (hard, https://ai.page/c/gas-exchange-and-breathing/en.md)

Concept id: heart-structure-and-double-circulation. Subject: science. Licence: CC BY-SA 4.0.

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