The Respiratory System
Across
- 2. a gas in the air that the body needs
- 7. a strong tube that carries air between the mouth or nose and the lungs
- 8. to breathe in air
- 10. the main organs of the respiratory system
- 12. a group of organs that work together to do a major job of the body
- 13. a gas in the air that the body gets rid of
Down
- 1. the system in your body that takes in air and gets rid of waste in the form of gases
- 2. a living thing
- 3. the smallest basic unit of life - a human is made up of millions of these!
- 4. to breathe out air
- 5. a group of the same kinds of cells working together to do a job
- 6. the millions of tiny air sacs in the lungs where gas exchange happens
- 9. the two tubes that the trachea breaks into
- 11. a group of different tissues working together to do a certain job