Across
- 4. basic unit of life
- 6. upper heart
- 8. forms scabs
- 10. System putting out CO2 and bringing in oxygen
- 11. Brings blood back to the heart
- 12. connects mouth and stomach
- 15. connects vein and artery
- 16. Liquid part
Down
- 1. Cells working together
- 2. lower heart
- 3. Takes blood away from the heart
- 5. sacs of lung tissue
- 7. digest begins
- 9. Bhronchi to alveoli
- 13. digested food is absorbed
- 14. Tissues working together