Across
- 2. Dome-shaped muscle that contracts during inhalation.
- 6. The process by which oxygen moves into the blood.
- 7. Muscle movement that increases chest volume during inhalation.
- 8. Windpipe that carries air to the lungs.
- 10. Tiny blood vessels surrounding the alveoli.
- 11. In Plants gaseous exchange occurs through
- 13. Tiny air sacs where gaseous exchange takes place.
Down
- 1. Waste gas removed from the body during exhalation.
- 3. Two branches that carry air into each lung.
- 4. Microscopic powerhouse where aerobic respiration occurs.
- 5. Pair of organs where breathing occurs.
- 9. Tiny hair-like structures that trap dust in the airways.
- 12. Gas required by cells for aerobic respiration.