Across
- 3. Large muscle that controls the lungs.
- 5. One of two places where air enters your body
- 6. The movement of carbon dioxide and oxygen between alveoli and capillaries.
- 9. All animals need this gas to make food into energy.
- 10. Tiny sacs where gas exchange takes place.
- 11. scientific name for the windpipe or air tube.
Down
- 1. Breathe out.
- 2. A gas that you breathe out. It is a waste gas.
- 4. Breathe in.
- 7. What we breathe.
- 8. Two tubes that connect the trachea to the lungs.