Across
- 6. / 60-100 bpm
- 7. / Take blood to the heart
- 9. / main pacemaker
- 10. / first chamber of the heart
Down
- 1. / the av junction and parkinge fibers
- 2. / backup pacemaker
- 3. /take blood away from the heart
- 4. / largest artery in the heart
- 5. / over 100 bpm
- 8. / under 60 bpm