Respiratory System

3. A substance that causes an allergic reaction
10. Remove + congestion, a drug that shrinks the swollen membranes in the nasal cavity, making it easier to breathe
13. Small branches that divide from the bronchus in the lungs
14. Against + cough, a drug that can decrease the central nervous system coughing reflex
15. Against + histamine, a drug or other compound that inhibits the effects of histamine; often used to treat allergies
17. Tiny air sacs in the lungs where oxygen and carbon dioxide exchange takes place
18. Respiration stops
20. Through + fence, a dome-shaped, muscular partition separating the thorax from the abdomen that plays a major role in breathing
21. A drug that helps remove mucous secretions from the respiratory system; it loosens and thins sputum and bronchial secretions for ease of expectoration
23. Labored or difficult respiration while lying down
24. Short, microscopic, hairlike structures
25. Deep and rapid respiration

1. A respiratory tract infection caused by an influenza virus
2. In + breath, the act of breathing in; inhalation
4. Rapid respiratory rate
5. Against + acetylcholine, an agent that inhibits the physiological action of acetylcholine
6. Abnormally slow respiratory rate
7. Discoloration of the skin (blue-gray) because of lack of oxygenation
8. Labored or difficult respiration
9. Bad + breathing, difficult or labored breathing
11. Fluid (mucus) expectorated from the lungs and bronchial tissues
12. To draw a foreign substance into the respiratory tract during inhalation
16. Shallow breathing and/or abnormally low respiratory rate
19. The major lung air passages that diverge from the windpipe
21. Out + breath, the act of breathing out; exhalation
22. Before + guard, treatment given before an event or exposure to prevent the condition or symptom