Directions: Fill in the blanks with the correct answer. Choose from the words inside

the box.

voice box nostrils rib cage trachea

alveoli pleura mucus expands

contracts trachea pharynx cilia

1. The nose is the outer part of the upper respiratory tract and has two openings

called _____.

2. Larynx is also called _____________ because it functions for the production of

sound.

3. ________is connected to the bottom part of the larynx.

4. The ________ and the ________ filter out dust and dirt from the air that enters

the nose.

5. Lungs lie in the chest cavity and are protected by the surrounding ____________.

6. When we inhale, the diaphragm _________ and pulls downward. When exhale, it

________ to force air out of the lungs.

7. The hollow tube that connects the larynx to the bronchi is called _________.

8. The ____________ are the grape- like structures at the end of the bronchioles.​