Across
- 8. One of two pairs of vessels carrying oxygenated blood from the lungs to the left atrium of the heart
- 10. Valve located between the right atrium and right ventricle
- 11. Abnormal swishing sound caused by improper closure of the heart valves
- 12. Contraction phase of the heartbeat
- 16. Specialized tissue in the wall between the atria
- 17. Innermost lining of blood vessels
- 18. Largest artery in the body
- 19. Largest vein in the body
Down
- 1. Pacemaker of the heart
- 2. Double-layered membrane surrounding the heart
- 3. Specialized muscle fibers connecting the atria with the ventricles and transmitting impulses between them
- 4. Record of the electricity flowing through the heart
- 5. Artery carrying oxygen-poor blood from the heart to the lungs
- 6. Instrument to measure blood pressure
- 7. Valve located between the left atrium and left ventricle
- 9. One of two lower chambers of the heart
- 13. Wall dividing two cavities
- 14. One of two upper chambers of the heart
- 15. Relaxation phase of the heartbeat