Across
- 2. ___ blood cells carry oxygen and carbon dioxide
- 3. Muscle that moves the lungs
- 11. "The voice box"
- 13. Largest vein in the body
- 15. Where oxygen moves into our blood
- 16. ___ blood cells fight disease
- 17. Closes to keep food out of our lungs
- 18. The only liquid part of blood
Down
- 1. "The wind pipe"
- 4. Oxygen binds to ___ in red blood cells
- 5. Protein inside red blood cells
- 6. Takes blood away from the heart
- 7. ___ vein & artery connect to lungs
- 8. Vessels that deliver blood to cells
- 9. Stops bleeding by plugging wounds
- 10. largest artery in the body
- 12. Brings blood back to the heart
- 14. Heart's lower chambers
- 15. Heart's upper chamber, where blood enters