Across
- 4. ventricular contraction
- 10. two lower chambers of the heart
- 11. red blood cells produced in red marrow
- 12. valve between right ventricle and pulmonary artery
- 13. abnormal heartbeats
- 15. receives the blood and returns it to the body
- 16. located between the left atrium and left ventricle
- 17. white blood cells
- 19. carry blood away from the heart
- 20. smooth layer of cells,line the inside of the heart
- 23. also called platelets
- 24. receives blood and carries it to the lungs for oxygen
Down
- 1. largest artery in the body
- 2. carry blood to the heart
- 3. muscular middle layer
- 5. the wall that separates the left and right sides of the heart
- 6. "the transportation system of the body"
- 7. needed for clotting,90% of water
- 8. receives blood from the left atrium and pumps to the aorta
- 9. valve between the right atrium and right ventricle
- 14. composed of heme and globin
- 18. double-layered membrane on the outside of the heart
- 21. the hearts brief period of rest
- 22. two upper chambers of the heart