Across
- 8. Carry electrical impulses through the R and L atria causing the atria to contract together
- 9. When heart muscles cells are at rest, There is no electrical activity in the cells
- 11. Between R ventricle & pulmonary artery
- 14. muscular middle layer of the heart
- 15. collects blood from body
- 19. Between L atrium & ventricle
- 23. blood vessels taking blood away from the heart
- 24. connects veins and arteries
- 25. Electrical path from atria to ventricles, Delays impulse
- 26. protective outer layer
- 27. Conducting fibers in the interventricular septum,Carries impulses to R & L ventricles
- 28. blood vessel that takes blood from the heart to the lungs
- 29. blood vessel that takes blood from the lungs to the heart
- 30. blood vessels taking blood towards from the heart
- 31. thin inner layer
Down
- 1. Heart muscle cell recovery period immediately after contraction, returning heart muscle cells to a resting state
- 2. The large vein that attaches to the heart
- 3. Electrical activation of the heart muscle cells
- 4. pumps blood to the lungs
- 5. Conducting fibers that branch off of the Bundle of His
- 6. collects blood from lungs
- 7. pumps blood to the body
- 10. ______ blood flows from the R atrium into the R ventricle
- 12. Between L ventricle & aorta
- 13. the arteries that provide oxygen and nutrients to the myocardium
- 16. Dividing “walls” between right & left sides of the heart
- 17. _______ blood returns to the L atrium of the heart via the pulmonary veins.
- 18. Between R atrium & ventricle
- 20. Numerous branches of fibers throughout the ventricular myocardium
- 21. The large artery that attaches to the heart
- 22. Where the electrical impulse is initiated