Across
- 2. regulates impulses between atria and ventricles.
- 5. an abnormal heart rhythm.
- 8. middle muscle layer of the heart
- 9. insufficient oxygenation of tissue
- 10. a slow heart rate.
Down
- 1. fast heart rate
- 3. outermost layer of the heart.
- 4. a sac that encases the heart
- 6. a device that produces stimulation to heart.
- 7. largest artery in the human body.