Respiratory System

4. The ______ pleura is attached to the inside of the rib cage.
9. A thin layer of ____ _____ allows bronchi and bronchioles to control the amount of air that passes through them.
11. NOT part of the conducting zone of the respiratory system -AND- another name for the voice box.
12. Separates the oral and nasal cavities:
13. Structure that serves as the first line of defense against bacteria and other pathogens that enter the throat.
14. Pneumonia attacks which organ of the respiratory system
15. Structure that transports food, air, and liquids; also known as the back of the throat

1. The movement of oxygen and carbon dioxide happens via _______
2. The flap of cartilage that covers the opening of the larynx during swallowing to prevent food or liquids from entering the trachea is called the ______.
3. The trachea breaks into two _____.
5. Oxygen molecules bond to _______ in the erythrocytes (red blood cells).
6. Functions of the mucus-covered ____ passages: warming inspired air, entrapping small particles, moistening inspired air.
7. The ______ is the main location of gas exchange.
8. These bones create three passageways that greatly increase the surface area available for filtering inspired air.
10. Exchange of oxygen across the epithelial layer inside the alveoli occurs _____ the concentration gradient.