Across
- 2. abnormally slow heart rate
- 3. valve that prevents backflow in left atrium
- 10. blood circulation between heart and lungs
- 11. SA node is also known as the
- 13. (AV) valve with three flaps
- 15. abnormally fast heart rate
Down
- 1. the inner lining of the heart
- 4. prevents backflow into the left ventricle
- 5. serous layer covering the heart muscle
- 6. discharging chambers of the heart
- 7. blood circulation between heart and body
- 8. outermost layer of the serous pericardium
- 9. heart muscle
- 12. receiving chambers of the heart
- 14. innermost layer of the serous pericardium