Across
- 3. These fibres carry electrical signal to the base of the heart to contract ventricles.
- 6. White blood cells that use T cells and produce antibodies to attack bacteria.
- 8. Carry oxygen and haemoglobin.
- 11. Chambers at top of heart.
- 12. Tiny vessel supplying tissues with blood.
- 15. The name of the build-up of fats and cells in blood vessels.
- 16. This pressure forces plasma through capillary walls.
- 17. ________ is regulated by blood.
- 19. Ventricles contracting.
- 22. This node passes signal to the atrium to contract.
- 23. The chemical to which oxygen binds in red blood cells.
- 24. The heart has 4 of these.
Down
- 1. White blood cells that kill bacteria.
- 2. Ventricles relaxing.
- 3. Often a type of vessel relating to the lungs.
- 4. Blood vessels supplying blood to the heart's own muscle.
- 5. Major vein at the heart.
- 7. Carries water-soluble nutrients in the blood.
- 9. Muscle that pumps blood around the body.
- 10. Stops the backflow of blood.
- 13. Blood vessel with thick walls.
- 14. The main artery at the heart.
- 16. Malfunction relating to high blood pressure.
- 18. Chambers at bottom of heart.
- 20. Valve also known as Tricuspid.
- 21. Measures electrical activity in the heart.