Respiratory System

1. the main organ of the respiratory system
6. the back of the throat; connects the mouth with the windpipe
7. plant structure through which a plant "breathes"
8. gas that is exhaled by mammals as part of respiration
10. the tube that carries food from the mouth to the stomach
11. the muscle that contracts and relaxes thereby causing one to inhale and exhale
13. a flap if tissue that covers the windpipe to keep food and water from entering it
14. the act of taking air into the lungs and expelling waste gases from the lungs
16. the breathing apparatus for fish and tadpoles
17. a sticky substance that lines the respiratory tract

1. that part of the throat that contains the voice box
2. of theses result in sound or speech
3. vibrations of these result in sound or speech
4. scientific name for the windpipe
5. microscopic hair-like structures in the respiratory tract
7. tiny holes on the abdomen of insects through which they breathe
9. the life process by which energy is released by cells
12. tiny air sacs in the lungs where oxygen and carbonxdioxide are exchanged
14. main branch of the respiratory tract leading into the lungs
15. the most abundant gas in the air we breathe