Respiratory System

3. muscular tube posterior to nasal and oral cavities (swallowing refelexes)
4. flap on top of larynx that folds down to prevent food and liquid entry
5. covers the inside surface of the rib cage and spreads over the lungs as well
6. constriction of bronchioles , usually caused by allergens
9. membrane that surrounds heart
11. cage skeletal structure that protects the heart and lungs
12. speaking and air passages
14. lubricates the pleural surface and makes it easy for them to slide over each other during lung inflation and deflation
16. structural features that supports the trachea to keep it open for air passage
17. muscle that helps with respiration by contraction when inhaling
18. air that remains in the lungs after the most forceful exhale

1. opening of the larynx
2. frequent in newborns who have not produced the surfactant that reduces the surface tension of the fluid in the lungs
3. inflammation of the lining of bronchial tubes, which carry air to and from the lungs
7. amount of air in one breath
8. the sum of two or more volumes (lung capacity)
10. a condition in which the air sacs of the lungs are damaged and enlarged, causing breathlessness
13. cords thin folds of tissue that are pulled over the glottis and vibrate during speech
15. total air lungs can hold