Respiratory System :)
Across
- 2. Hollow cavities in the head that aid in breathing
- 3. The air sacs in the lungs
- 5. The tubes that deliver oxygen into the lungs
- 6. The chambers of the lungs
- 7. The place in which the lungs and heart live
Down
- 1. The thin muscle below your lungs
- 4. Our favorite little meat flap that keeps us from choking