Across
- 1. - Sticky substance that collects germs and other particles.
- 3. - Small sponge air sac that picks oxygen and let go of dioxide carbon from the bloodstreams.
- 5. - Windpipe that filters the air.
- 8. - Tiny hair that obstruct all the dust particles.
Down
- 2. - Tiny hair that moves the mucus.
- 4. - Considered the main organ of the respiratory system. It has lobes and one is smaller than the other.
- 6. - The organ of smell which pulls the air.
- 7. - Two tubes that contain the cilias.