Across
- 3. A dome-shaped part of the body. The diagram's main purpose is to expand and contrast.
- 6. Two large tubes that carry air from the windpipe to the lungs
- 8. a small part of the respiratory system. The alveoli's main purpose is to exchange gas
- 10. something you use to breath thats on your face
- 11. Gas that the body needs
Down
- 1. Tiny blood vessels
- 2. dioxide
- 3. the movement of molecules from a high concentration to a low concentration.
- 4. Air passage that branches off from the bronhi
- 5. trachea carries wind and air and connects the throat and lungs.
- 7. Bones that connect the lungs and heart.
- 9. Two sac-shaped organs that move oxygen into the bloodstream.