Across
- 2. Small artery.
- 3. One of two lower chambers of the heart.
- 5. Structure in veins or in the heart
- 6. Partition or wall dividing a cavity
- 8. Gas that enters the blood
- 9. Smallest type of blood vessel.
- 11. Relaxation phase of the heartbeat
- 12. Largest type of blood vessel
- 13. Instrument to measure blood pressure.
Down
- 1. Small vein.
- 2. Largest artery in the body.
- 4. Electrical record of the heart
- 6. Contraction phase of the heartbeat.
- 7. Muscular middle layer of the heart.
- 10. Inner lining of the heart.