Across
- 6. blood blood that contains CO2
- 9. middle area of the kidney
- 12. muscle ring of muscle around urethra
- 13. getting rid of wastes the body produces
- 14. drains urine
- 17. filters 50L of blood per hour
Down
- 1. narrowest blood cell
- 2. blood blood rich in oxygen
- 3. A fatty chemical that can cause blockages in the arteries
- 4. gives pigment to red blood cells
- 5. blood vessel that carries blood back to the heart
- 6. getting rid of solid waste
- 7. stores urine
- 8. Muscle muscle that never stops working, heart muscle
- 10. 20cm long tubes
- 11. Tract kidneys, bladder, ureters, urethra
- 15. blood vessel that carries blood away from the heart
- 16. sweat is excreted through the.......