Across
- 5. partition or wall
- 7. dioxide gas(waste)
- 8. inner lining
- 11. lower tip
- 12. oxygen-poor
- 13. cava largest vein
- 14. largest artery
- 15. smallest type of blood vessel
Down
- 1. swishing sound
- 2. contraction phase
- 3. smallest artery
- 4. sinoatrial node
- 6. small vein
- 9. relaxation phase
- 10. heart