Across
- 7. The muscle you use to breathe
- 8. The top chambers of the heart
- 9. The largest veins in the body
- 12. Carries blood toward the heart
- 13. Your voice box
Down
- 1. Tubes that branch off to each lung
- 2. The largest blood vessel in the body
- 3. The chambers of the heart the pump blood
- 4. The main organs of your respiratory system
- 5. Your windpipe
- 6. Flap of tissue at the back of your mouth
- 10. Carries blood away from the heart
- 11. The air sacks in your lungs