Across
- 3. Two passages that direct air into the lungs
- 4. The process of removing wastes
- 7. The main organ of the respiratory system
- 9. The system that brings air containing oxygen into your blood and takes carbon dioxide out
Down
- 1. A small filtering structure in the kidneys that filers waste
- 2. The condition the body is kept in internally no matter outside conditions
- 5. Two bean shaped organs that filter blood and regulate the amount of blood in your body
- 6. Tiny thin walled sacs of lung tissue where gases can move between air and blood
- 8. The exchange of gases in and outside of the body
- 10. Windpipe