The Respiratory System
Across
- 1. The windpipe in the throat where air enters after it comes into the nose or mouth
- 4. Breathing out, or pushing air out of the lungs
- 5. Breathing in, or air coming into the lungs
- 6. tubes The two branches of the trachea
- 9. The dome-shaped sheet of muscle under the lungs that controls breathing in and out
- 10. The place where air comes into the body through the nostrils
Down
- 2. The millions of tiny air sacs which make up the lungs
- 3. The gas in the air that is needed by the body to burn food energy and to stay alive
- 7. The two organs that air passes into and out of so blood can receive oxygen and give off carbon dioxide
- 8. dioxide the waste product given off when exhaling