Down
| 1. | This organ is the entrance to the respiratory tract in the body. It is also used for smelling. |
| 2. | The muscle and cartilage where your vocal cords are located. This is also called your voice box. |
| 4. | The system that includes your nose, trachea, lungs, and diaphragm. (2 words) |
| 5. | a sudden, explosive exhalation through the nose |
| 7. | the colorless gas that you breathe out as waste (2 words) |
| 13. | The air passage in your throat that leads to the lungs. This is also called your windpipe. |
| 16. | the bones that protect your lungs |
| 17. | one of the two openings in the nose |
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Across
| 3. | The fleshy folds of tissue in the larynx. They vibrate and produce sound when air passes through the opening between them. (2 words) |
| 6. | When you breathe in through your nose, air enters this and will continue towards the pharynx. (2 words) |
| 8. | the smallest and thinnest air tubes in the lungs |
| 10. | The flap of cartilage behind your tongue. This closes the opening to your windpipe when you are swallowing food. |
| 11. | The two breathing organs where gas exchange occurs in the body. |
| 12. | the dome-shaped sheet of muscle that forms the bottom of the chest cavity |
| 15. | A membrane that encloses each of the lungs. |
| 18. | the passage that allows air to travel from your mouth and nose to your lungs (2 words) |
| 19. | the tiny hairs inside your air tubes that keep dirt away from your lungs |
| 20. | the tiny air sacs in the lungs that take oxygen from the air and put it into the blood |
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