Across
- 2. comes from the Greek word meaning 'to gasp'
- 4. infection of the lung tissue
- 7. organ that is divided to primary, secondary & tertiary
- 8. main external respiratory organ
Down
- 1. what the respiratory system is primarily responsible for
- 3. known as the 'windpipe'
- 5. known as the 'voicebox'
- 6. central organs of respiration