Across
- 5. the muscular tissue that forms the middle layer of the heart wall
- 7. muscular chamber that pumps blood
- 11. the innermost layer of tissue that lines the heart chambers and valves
- 12. Artery- the system of transportation of blood
- 13. the smallest type of blood vessel
- 15. a type of blood cell
Down
- 1. a chamber in the heart hat receives blood
- 2. large vein carrying the heart
- 3. largest artery in the human body, carrying oxygenated blood from the heart to the rest of the body.
- 4. a double-layered sac that surrounds the heart and its roots
- 6. blood vessels that carryfrom the body's tissues back to the heart
- 8. small colorless cell in the blood
- 9. white blood cells
- 10. Vein-a blood vessel that carries oxygen
- 14. a blood vessel that carries oxygenated blood away