Across
- 4. A small, branched airway in the lungs.
- 5. Respiratory structure that filters, warms, and moistens air and helps us smell.
- 7. The majority of carbon dioxide travels in the blood as this ion.
- 8. Muscle used for breathing.
- 9. Process whereby carbon dioxide is expelled from the lungs.
Down
- 1. Space at the back of the nose and mouth.
- 2. Also known as the windpipe.
- 3. Where cellular respiration takes place.
- 6. Thick strands of tissue across the larynx that vibrate to make sound (2 words).
- 10. This lung has only two lobes.