Heart of the Matter
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Heart of the Matter
A double-pump system
The heart is a muscular organ with four chambers. The right side receives oxygen-poor blood from the body and pumps it to the lungs. In the lungs, blood releases carbon dioxide and picks up oxygen. Oxygen-rich blood returns to the left side of the heart, which pumps it around the body. Valves help keep blood moving in one direction. The wall of the left ventricle is thicker than the right ventricle’s wall because it must pump blood around the whole body, while the right ventricle pumps blood only to the nearby lungs. Haemoglobin in red blood cells carries oxygen from the lungs to body cells.
- A
- B
- C
- D
- E
- F
- G
- H
- Aorta
- Pulmonary artery
- Left ventricle
- Left atrium
- Right ventricle
- Vena cava
- Pulmonary veins
- Right atrium
- Aorta
- Pulmonary artery
- Pulmonary veins
- Vena cava
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