Function of Kidney

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