Across
- 3. Thin-walled vessel that carries blood from body tissues and lungs back to the heart.
- 7. Double-layered membrane surrounding the heart
- 10. Muscular middle layer of the heart.
- 11. Specialized nervous tissue in the right atrium that begins the heartbeat.
- 12. Beat of the heart as felt through the walls of the arteries
- 14. contraction phase of the heartbeat.
- 15. Largest artery in the body
Down
- 1. Inner lining of the heart
- 2. Innermost lining of blood vessels
- 4. Valve between the left atrium and the left ventricle; Bicuspid
- 5. Valve located between the right atrium and the right ventricle; it has three left lets or cusps.
- 6. Partition or wall dividing a cavity; such as between the right and left atria.
- 8. Smallest type of blood vessel
- 9. Relaxation phase of the heartbeat.
- 10. Abnormal swishing sound caused by improper closure of heart valves.
- 13. carries blood away from the heart to all parts of the body.