Across
- 4. A tube that enters the chest cavity that splits into two smaller tubes called bronchi.
- 6. Are the main organ in the respiratory system
- 7. When humans exhale they release this.
Down
- 1. Is located above the larynx which is where sound and speech is produced.
- 2. A function needed to keep humans alive by giving cells oxygen.
- 3. Serves as the body's pump that pumps in oxygen and pumps out carbon dioxide.
- 5. This is where the gas exchange of oxygen and carbon dioxide occurs.