Across
- 3. Relaxation of the heartbeat
- 5. The muscular middle layer of the heart
- 6. Heartbeat
- 7. Membrane surrounding the heart
- 10. Pulmonary ______. Flow of blood from the heart to the lungs and back to the heart
- 12. Vessel
- 13. Largest artery in the body
Down
- 1. Record of the electricity flowing through the heart
- 2. _______ artery. Carries oxygen poor blood from the heart to the lungs
- 4. Carries blood away from the heart
- 8. Improper closing of the heart valves (extra sounds between normal beats)
- 9. Contraction phase of the heartbeat
- 11. _____ arteries. Carries oxygen rich blood to the heart