Respiratory System

4. butterfly-shaped gland in your neck, just above your collarbone.
7. condition in which the air sacs of the lungs are damaged and enlarged, causing breathlessness
10. the hollow muscular organ forming an air passage to the lungs and holding the vocal cords
14. Actual site of gas exchange.
15. Conductors to the nasal cavity.
16. located below the lungs, is the major muscle of respiration
17. division between upper an lower respiratory system.
20. Also known as the windpipe, air travels down the nose, through your larynx, and down your windpipe.
21. The ducts that lead to the alveoli.

1. the membrane-lined cavity behind the nose and mouth, connecting them to the esophagus
2. pair of soft tissue masses located at the rear of the throat (pharynx).
3. Pleural layer covering the lungs
5. smallest conducting respiratory passageways.
6. two large tubes that carry air from your windpipe to your lungs.
8. Infection that inflames air sacs in one or both lungs, which may fill with fluid.
9. condition in which a person's airways become inflamed, narrow and swell, and produce extra mucus, which makes it difficult to breathe.
11. system in charge of gas exchange between pulmonary blood and external environment
12. Purpose of mucose.
13. main organ in the respiratory system.
18. Pleural layer covering the thorax walls
19. Separates oral and nasal cavities