Across
- 3. how many chambers does the heart have?
- 5. has valves
- 6. when ventricles relax
- 8. slow heartbeat
- 9. which fibers are the last to fire in the conduction system?
- 11. S2 heart sound
- 13. S1 heart sound
- 14. which layer of the heart is the thickest?
- 15. rapid heartbeat
- 17. silent killer
- 18. resistance vessels
- 20. the electrical insulator of the heart
- 21. which is the outermost layer of the pericardium?
- 22. takes blood away from the heart
- 23. which node is the pacemaker?
Down
- 1. a change from the normal sequence of electrical impulses
- 2. when ventricles contract
- 4. which heart layer is in contact with the blood inside of the heart?
- 7. main function of the cardiovascular system
- 10. improper closure of the upper and lower left chamber valves
- 12. which circuit starts in the right ventricle and ends in the left atrium?
- 16. which circuit transports oxygen-rich blood?
- 19. which pericardial layer is also known as the epicardium?