Across
- 2. The electrical pulse that keeps the heart beating at a normal rate
- 4. The doors that keep blood flowing smoothly around the heart in one direction
- 6. carries deoxygenated blood back directly to the heart
- 9. Large chambers located at the bottom of the heart
- 11. Divides the two ventricles
Down
- 1. The main tissue making up the heart
- 3. Where the nutrients in the blood go to the cells
- 5. Carries blood back to the heart
- 7. The main artery of the body, basically a highway for all blood
- 8. The upper blood pockets of the heart
- 10. Carries blood away from the heart