Across
- 4. Single layer or flat cells lining blood vessels
- 7. Wall that divides heart
- 9. atrium Takes in oxygenated blood
- 12. Formation of white blood cells
- 13. Measures a fluid resistant to flow
- 15. Heart beat cycle
- 16. The volume of the air expired per breath
- 17. Artery narrowing conditions blood cells
- 18. Second part of the cardiac cycle
- 20. The nerve going to the diaphragm
Down
- 1. Formation of platelets
- 2. SA node responsible for speeding up the heart beat
- 3. the rise in the heart rate before exercise
- 5. vein Takes fresh blood from lungs to the heart
- 6. White blood cells that defends RBC
- 8. Smallest blood vessels
- 10. Double pump
- 11. Small veins that carry blood from capillaries to the heart
- 14. The name of the shift for oxygen dissociation
- 19. Immunity (produces antibodies)