Across
- 3. absorbed my plants in photosynthesis
- 5. main function
- 6. a group of tissue
- 9. taking air in and out
- 10. where we receive food
- 11. a set of things working together
Down
- 1. organ we smell through
- 2. a colorless and odorless gas
- 4. increases the volume of the thorax and so inflates the lungs
- 7. a large tube that helps convey air to the lungs
- 8. primary organ of the respiratory system