Across
- 4. A large vein that carries blood from the heart to other parts of the body
- 8. a small device used to treat some arrhythmias
- 9. prevents the backward flow of blood
- 11. an exchange center where things your cells need move toward them
Down
- 1. chamber that pumps blood out of the heart and into the circulatory system
- 2. carries blood away from the heart
- 3. a wall separating the right and left sides of the heart
- 5. the largest blood vessel in the body
- 6. one of the two upper chambers of the heart that receives blood from the body and lungs
- 7. the thick middle layer of the heart
- 10. carries blood to the heart