Across
- 3. this fluid begins digesting in the mouth
- 5. organ that pumps blood
- 7. system that moves blood through the body
- 10. body parts that work together to do a job
- 11. system that takes nutrients from food
- 12. where acids digest food
- 13. carried by the blood to the muscles
Down
- 1. another name for the circulatory system
- 2. large and small
- 4. connects lungs to the mouth and throat
- 6. fill with air like balloons
- 8. blood vessels
- 9. system that takes oxygen from the air