Respiratory System

3. Another name for the pharynx.
5. Another name for trachea.
6. A piece of cartilage acts like a lid over the larynx.
11. ___________ brings oxygen into the lungs and eliminates carbon dioxide
14. During inhalation the epiglottis lifts up so that air passes over the larynx and into the _______
15. The respiratory system is divided into the _____ respiratory tract and the lower respiratory tract.
16. Look like small clusters of grapes.
19. Eventually, the bronchioles and end in tiny air sacs with a single cell layer.
20. Respiration involves inhalation & __________.

1. Every Cell Needs This To Survive
2. The epiglottis prevents _________ from entering the airway during swallowing.
4. The right lung has _____ lobes.
6. Breathing out
7. Breathing In
8. Each lung is covered by a two-layered sac called.
9. The bronchus enters the lung and further divides into small branches called ___________.
10. Alveoli are surrounded by theses.
12. Lungs are separated from the abdominal cavity by a muscle called the _________.
13. Air enters the nose and passes into the ______.
17. These are spongy tissues filled with alveoli, blood vessels, and nerves.
18. The voice box.