Waste warrior

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Across
  1. 3. The structural and functional unit of kidney.
  2. 5. the outer dark region of the kidney.
  3. 6. It helps to remove carbon dioxide through the nose..
Down
  1. 1. It produces bile pigments from the haemoglobin of dead RBC.
  2. 2. It has cooling effect on our body.
  3. 4. The process that expels waste products from the body