Across
- 1. if a cell ignores a signal to stop dividing, the newly divided cells from a mass called a ..
- 3. 2 lower chambers called the right and left
- 8. tine vessels connecting arteries to veins
- 9. two tubes that travel to the left and right wings
- 10. 2 upper chambers called the right and left
- 11. this blood vessel carries blood vessel to the heart
- 12. During ___, the chromosomes align in the centre of the cell
- 14. this blood vessel carries blood away from the heart
Down
- 1. how many kind or cells work together?
- 2. air that enters the air sacs is rich in..
- 4. seperated into 4 parts
- 5. thin band of muscle involved in breathing
- 6. protein rich liquid
- 7. 2 air filled,spongy organs
- 13. makes up less then 1% of blood volume