Across
- 3. Harmful or poisonous
- 4. Waste removed in urine
- 7. Waste gas removed by the lungs
- 9. Process that releases energy and produces CO2
- 11. Small charged particles lost in sweat and urine
- 12. Keeping internal conditions stable
Down
- 1. Toxic substance formed from excess amino acids
- 2. Process of removing waste from the body
- 5. Fluid that carries urea in the blood
- 6. Organ that produces urea
- 8. Organs that filter blood and make urine
- 10. Body surface that can also remove water in sweat