Across
- 1. tissue fluid consists mainly of ... and white blood cells
- 3. blood clot
- 4. supply blood to the heart
- 5. the scientist who demonstrated the one-way action of valves
- 7. measurement of heart activity
- 8. component of blood
- 12. heart muscle
- 15. circulatory system in fish
- 16. heart valve
- 18. type of white blood cell
- 19. the circulatory system in humans
- 20. controls heart beat
Down
- 1. left atrium receives blood from the ... vein
- 2. condition where the heart is in short oxygen supply
- 6. high carbon dioxide concentration ... the heart rate
- 9. blood vessel carries blood away from the heart
- 10. when heart is relaxed
- 11. involved in blood clotting
- 13. type of blood vessel
- 14. carry deoxygenated blood
- 17. inorganic element in blood
- 21. blood vessels assoicated with the kidney