Across
- 4. smaller branches inside the lungs
- 5. Holds the vocal cords
- 6. contracts to cause inspiration
- 8. The site of gas exchange
- 9. cavity Warms and filters the air with cilia
Down
- 1. Opens during breathing, closes during eating
- 2. windpipe
- 3. Full of hair and mucus to trap microbes and dust
- 4. Two branches at the bottom of the trachea
- 7. The throat