Respiratory System
Across
- 4. connects the windpipe to the lungs
- 5. located in lungs where blood turns oxygen to carbon dioxide
- 7. where the breathing starts
- 8. main system used for breathing
Down
- 1. also called a windpipe
- 2. breathing tube under the nose
- 3. an organ which pulls in air into the lungs
- 6. where the heart resides