Across
- 3. the gas we need to transfer to cells for respiration
- 5. the tube connecting the nose and mouth to the lungs
- 6. the scientific word for breathing out
- 7. a sponge like organ responsible for gas exchange
- 8. the gas we need to get rid of from the body
- 11. these are made of bone and protect the heart and lungs
- 12. the scientific word for breathing in
- 13. the flat sheet of muscle that separates the chest from the lower part of the thorax
Down
- 1. the small tubes within the lungs that end in tiny air sacs
- 2. this and the mouth are where air enters and leaves the body
- 4. the two tubes that split from the trachea and join it to each lung
- 9. the tiny air sacs where gas exchange happens in the lungs
- 10. these muscles move the ribs