Across
- 2. Arteries that supply blood to the heart.
- 5. Prevent back flow of blood from ventricles to atria.
- 6. Relaxation of the heart.
- 10. Accumulation of fat deposits in blood vessels.
- 12. Site of gas, nutrient and waste exchange.
- 13. Thick-walled chambers of the heart.
- 15. Vena cava bringing blood to the heart from the arms and head.
- 18. Thin-walled chambers receiving blood from veins.
- 20. Valves separating ventricles from arteries.
- 21. Change in diameter of arteries following a heart beat.
- 22. Contraction of the heart.
Down
- 1. Artery carrying deoxygenated blood.
- 3. Carry blood away from the heart.
- 4. Prevents mixing of oxygenated and deoxygenated blood.
- 7. Increasing diameter of arterioles.
- 8. Connective tissue supporting the AV valves.
- 9. Pacemaker.
- 11. Protective fluid-filled sac around the heart.
- 14. Last exit from the heart.
- 16. Nerves carrying electrical impulses through the ventricles.
- 17. Assist in the movement of blood back to the heart.
- 19. Larger diameter and lower pressure than arteries.
- 23. Pulmonary circulation is from the heart to the _____________ and back.