Across
- 2. smallest blood vessels
- 3. the outermost protective layer of the heart
- 6. a surgical connection between two structures
- 8. helps pump blood back to the heart
- 12. when the heart muscle relaxes
- 14. one of two upper chambers in the heart that receives blood
- 16. a blood vessel that carries blood to the heart form tissues and organs
- 17. a fluid filled cavity in the heart or brain
- 18. favorite color is blue
- 19. a protective, fluid filled sac that surrounds the heart
- 20. period of contraction of the ventricles
- 21. the product of heart rate and stroke volume
Down
- 1. a special muscle tissue that forms the heart
- 4. a small blood vessel that receives blood from the capillaries
- 5. small blood vessels
- 7. the widening of blood vessels
- 9. makes electrical signal that causes heart chambers to contract
- 10. a blood vessel that carries blood from the heart to tissues and organs
- 11. flaps that act as gate for blood
- 13. narrowing of blood vessels
- 15. creates blood pressure