Across
- 1. small artery
- 5. Partition or wall dividing a cavity
- 7. smallest type of blood vessel
- 10. narrowing of the aorta
- 11. Blood that is oxygen-poor
- 12. Largest artery in the body
- 14. Extra heart sound, heard between normal beats
Down
- 2. Innermost lining of blood vessels
- 3. One of two lower chambers of the heart
- 4. Specialized nervous tissue in the right atrium that begins the heartbeat
- 5. contraction phase of the heartbeat
- 6. valve between the left atrium and the left ventricle
- 8. Muscular middle layer of the heart
- 9. Inner lining of the heart
- 13. one of two upper chambers of the heart