Respiratory System
Across
- 4. tubes in the lungs that branch off from Bronchi
- 6. move mucous out of the synus and nose
- 8. Smallest functional unit in the respiratory tract
- 9. airways that lead from the trachea into the lungs
Down
- 1. Skeletal muscle that sits at the base of the chest
- 2. The action of breathing
- 3. commonly known as windpipe
- 5. Also known as O2
- 7. commonly called the voicebox