Across
- 3. air is breathed in and filtered by tiny hairs called Cilia
- 5. Dome shaped muscle attached to the lower ribs
- 7. A waste product exhaled by the body
- 9. single cell wall thickness
- 11. separates the right side of the heart from the left
Down
- 1. Tiny air sacks found at the end of the bronchioles
- 2. the wind pipe of the body
- 4. the only artery to carry de-oxygenated blood from the heart to the lungs
- 6. Cardiac muscle
- 8. diffuses into the bloodstream
- 10. largest artery in the body