Respiratory System

1. nose bleeding
3. soft spongy, cone-shaped organs in the thoracic cavity
4. windpipe, extends downward in front of esophagus
7. when the septum bends to one side
10. max. amount of air a person can exhale
13. air remaining in the lungs even after forceful exhalation
14. behind the oral cavity,between the nasal cavity and larynx
16. branched airways leading from the trachea to the air sacs in the lungs
18. gas exchange between the blood and body cells
19. clusters or air sacs at the end of the bronchioles
20. spongy bone that divide the nasal cavity, support the mucus membrane and increases surface area
22. when the mucus membrane becomes swollen and prevents the vocal cords from vibrating freely
24. type of cell in the alveoli

1. flaplike structure that stands upright, allows air to enter larynx, during swallowing it presses downward and prevents food from entering air passages
2. reduces tendency of alveoli to collapse
5. the process of oxygen use and CO2 productionat the cellular level
6. moves downward and the atmospheric pressure in the alveoli falls, which forces air into the airways
8. gas exchange between blood and air
9. the amount of air that enters the lungs during 1 cycle
11. held tightly together, move with the contractions of muscles
12. left and right bronchioles, alveolar ducts, alveolar sacs in the lungs
15. produce sound
17. enlargement at the top of the trachea and below pharynx, conducts air in and out of trachea
21. fluid in pleural cavity that lubricates surfaces during breathing
23. triangular slit that opens during breathing/talking, and closes during swallowing