Across
- 2. The heart rests on your _____?
- 3. _______ circulation; heart's own blood vessel
- 4. Entry Hall of the heart
- 5. Circuit from heart > lungs > heart
- 8. Age of fastest heart rate
- 9. Pressure during relaxation
- 10. Carries blood away; but smaller
- 11. Dual layered heart protection
- 12. Strong vessels that carry blood away
- 17. Brings blood back; but smaller
- 18. Pressure during contraction
Down
- 1. Pacemaker of the heart
- 2. Sound of Semilunar valves closing
- 3. Allows exchange of materials between blood and tissues
- 6. Node that fires with a delay
- 7. Little Bellies of the heart
- 13. Circuit from heart > body > heart
- 14. Sound of Atrioventricular valves closing
- 15. Thinner vessels that bring blood to the heart
- 16. The heart is about the size of your ___?