Across
- 3. Low red blood cell count
- 6. Muscular middle layer of the heart wall
- 9. Smallest blood vessels where exchange occurs
- 14. Tool used to listen to heartbeat
- 15. Vein that drains blood from the liver
- 17. Carry blood away from the heart
- 20. Upper chamber of the heart
- 21. Cell fragments involved in clotting
- 22. Divides left and right sides of the heart
- 24. White blood cells
- 25. Largest artery in the body
Down
- 1. Inner lining of the heart
- 2. Carry blood towards the heart
- 4. Red blood cells
- 5. Arteries in the thighs that supply blood to the legs
- 7. Relaxation phase of the heartbeat
- 8. Artery that supplies blood to the brain
- 10. Liquid component of blood
- 11. Outer layer of the heart wall
- 12. Lower chamber of the heart
- 13. Cardiovascular system
- 16. Irregular heartbeat
- 18. Contraction phase of the heartbeat
- 19. Prevents backflow of blood in the heart
- 23. Protein in red blood cells that transports oxygen