Across
- 3. circulation from the heart to the lungs and back
- 8. bundle of cells that allow electrical conduction
- 9. lower heart chambers
- 12. wall between the left and right sides of the heart
- 15. protection against germs and a cardiovascular function
- 16. muscular tissue of the heart
- 18. smaller than veins yet bigger than capillaries
- 19. blood pressure exerted on the artery walls between beats
- 23. spontaneous contractions from muscle tissue
- 24. electrical signal passes through it delaying it a little
- 27. smaller than arteries yet bigger than capillaries
- 28. red blood cells
- 30. fibres that spread the electrical signal to the apex
Down
- 1. valves at the base of the arteries leaving the heart
- 2. concerns the liver
- 4. main artery out of the heart carries oxygenated blood
- 5. sac the heart sits in
- 6. equals the bicuspid valve
- 7. these form clots to prevent bleeding
- 10. the heart's natural pacemaker locates here
- 11. white blood cells
- 13. slow heart beat
- 14. blood pressure exerted on the artery walls on the beat
- 17. concerns the kidneys
- 20. fast heart beat
- 21. gaseous exchange happens in and out of these vessels
- 22. the vena cava from below
- 25. the vena cava from above
- 26. upper chambers of the heart
- 29. graphical output of the heart's electrical activity