Across
- 2. Contraction of a heartbeat
- 6. Abnormal swishing sound
- 9. Smallest blood vessels
- 10. Largest type of blood vessels
- 12. Beat of heart felt through walls of an artery
- 13. Gas that enters blood through the lungs
Down
- 1. Weighs less than one pound
- 2. Partion dividing a cavity
- 3. Relating to the lungs
- 4. Largest artery in the body
- 5. Chambers of the heart
- 7. Relaxation phase of a heartbeat
- 8. Small vein
- 10. lower tip of the heart
- 11. Smooth layer of endothelial cells