Across
- 4. largest artery in the body
- 5. the flow of blood from body tissue to the heart and back to body tissue
- 7. they carry oxygenated blood from the lungs to the heart
- 9. doubled layered membrane surrounding the heart
- 11. heartbeat felt through arteries walls
- 12. lower chamber of the heart
- 13. blood that is oxygen-poor
- 14. large blood vessels
Down
- 1. they carry oxygen-poor blood from heart to lungs
- 2. Smallest type of blood vessel
- 3. innermost layer of epithelial cell
- 4. upper chamber of the heart
- 6. valve that lies between the left atrium and ventricle
- 8. small artery
- 10. Small vein
- 13. relaxation phase of hearbeat