Match these items.

1. vocal cords - thick, sticky substance

2. sinus - chest area

3. alveoli - air sacs

4. bronchus - cartilage dividing nose in two parts

5. mucus - mucous folds in voice box

6. trachea - windpipe

7. thorax - branch of the windpipe

8. septum - smaller cavity above or near nasal cavity

The items are matched below -

Explanation:

1. Vocal cords - mucous folds in voice box

2. Sinus - smaller cavity above or near nasal cavity

3. Alveoli - air sacs

4. Bronchus - branch of the windpipe

5. Mucus - thick, sticky substance

6. Trachea - windpipe

7. Thorax - chest area

8. Septum - cartilage dividing nose in two parts

All of the above are parts of human respiratory system.

it's all four options.