Across
- 4. outermost tissue layer that envelops all vertebrate hearts
- 6. blood vessels that carry blood back to the heart
- 8. makes up most of red blood cells
- 13. red blood cell
- 15. a condition in which blood flow to part of the heart muscle is blocked, causing heart cells to die
- 16. the wall of tissue that separates the right side of the heart from the left side of the heart
- 17. The muscle layer of the heart
- 18. the alternating expansion and relaxation of an artery wall as blood travels through an artery
- 20. body system that consist of the heart,blood vessels, and blood
- 21. prevent and stop bleeding
Down
- 1. abnormally high blood pressure
- 2. the pressure that is exerted by the blood against the walls of blood vessels.
- 3. each of the two upper chambers of the heart that receives blood that comes into the heart
- 5. cell fragments that play an important part in forming blood clots
- 7. the innermost layer of the heart
- 9. the largest artery of the body
- 10. each of the two lower chambers of the heart that pumps blood out of the heart
- 11. blood vessels that carries blood away from the heart
- 12. the liquid portion of blood
- 14. a hollow muscular organ that pumps blood throughout the body
- 19. white blood cell