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