Across
- 3. small chambers in the heart that pump blood into the ventricles
- 5. a device used to correct heart fibrillation
- 6. large chambers in the heart that pump blood into the arteries
- 7. to do with the lungs
- 8. stops the backflow of blood
- 10. the main artery that takes blood to the whole body
- 11. the human circulatory system has two loops this is known as
Down
- 1. the main vein that returns blood from the body to the heart
- 2. the valve separating the right atrium and ventricle
- 4. irregular beating of the heart
- 7. the bundle of nerves that regulates the heartbeat
- 9. the wall that divides the two sides of the heart