Respiratory System

6. Respiration involves inhalation & __________.
8. The respiratory system is divided into the _____ respiratory tract and the lower respiratory tract.
9. The right lung has _____ lobes.
10. Breathing In
12. During inhalation the epiglottis lifts up so that air passes over the larynx and into the _______
13. The bronchus enters the lung and further divides into small branches called ___________.
17. Look like small clusters of grapes.
20. Eventually, the bronchioles and end in tiny air sacs with a single cell layer.

1. Lungs are separated from the abdominal cavity by a muscle called the _________.
2. Breathing out
3. ___________ brings oxygen into the lungs and eliminates Co2
4. Another name for trachea.
5. Every Cell Needs This To Survive
7. The epiglottis prevents _________ from entering the airway during swallowing.
9. Another name for the pharynx.
11. Air enters the nose and passes into the ______.
14. Alveoli are surrounded by theses.
15. A piece of cartilage acts like a lid over the larynx.
16. Each lung is covered by a two-layered sac called.
18. The voice box.
19. These are spongy tissues filled with alveoli, blood vessels, and nerves.