Across
- 4. waste produced by kidneys (5 letters) - Urine
- 5. waste from the blood (7 letters) - Kidneys
Down
- 1. help regulate this, keeping it at a healthy level - Electrolytes
- 2. filtering unit inside the kidneys (10 letters) - Nephrons
- 3. that kidneys filter out of the blood (4 letters) - Urea
- 6. system that includes the kidneys (10 letters) - Urinary