Across
- 1. White Blood Cell
- 3. Red Blood Cell
- 6. Thick muscular layer of the heart wall.
- 10. carry's oxygenated blood
- 12. Protective wall surrounding the heart.
- 14. Smallest blood vessels
- 15. Upper chamber of the heart
Down
- 2. Inner lining of the heart chambers
- 4. carries blood away from the heart
- 5. Largest artery that carries blood
- 7. Lower chamber of the heart
- 8. Platelets
- 9. carry's deoxygenated blood
- 11. Largest vein that brings blood back
- 13. returns blood to the heart