Across
- 3. Sacs of lung tissue
- 6. Forms scabs
- 7. Helps with breathing
- 11. Filters waste in urine
- 13. Exchange oxygen and carbon dioxide through blood
- 14. Connects the mouth and the stomach
- 15. Tissues working together
Down
- 1. Allows air into lungs
- 2. Liquid part of blood
- 4. Stores urine
- 5. Hearts lower chamber
- 8. Upper chamber of heart
- 9. Cells working to perform a job
- 10. The basic unit of all living things
- 12. Filter found in kidneys