Across
- 4. Tubes branching into lungs from the trachea.
- 5. Muscle aiding in lung expansion and contraction for breathing.
- 6. Tube connecting mouth/nose to the windpipe.
- 7. Tiny blood vessels facilitating gas exchange in the alveoli.
- 11. Entry points for air into the body's respiratory system.
Down
- 1. lobes Sections of the lungs.
- 2. Bones protecting the lungs and heart.
- 3. Air passage from throat to lungs.
- 4. Small tubes leading to the alveoli.
- 8. Tiny sacs in lungs where oxygen and carbon dioxide exchange occurs.
- 9. Air-filled spaces in the skull regulating air temperature and humidity.
- 10. Organs extracting oxygen from air and transferring it to the bloodstream.