Across
- 2. upper chambers of the heart
- 3. cavity within the pericardium middle layer containing fluid that lubricates de heart
- 5. largest single artery
- 6. fast
- 9. arteries supply blood to the head and neck
- 12. pulse
- 14. lower chambers of the heart
- 15. smaller veins
Down
- 1. cells in the interior of the heart
- 4. smaller arteries
- 7. heart
- 8. heart beat felt through wall arteries
- 10. mucus
- 11. slow
- 13. prevent backflow and moves blood in one direction