The excretory system

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Across
  1. 3. A chemical waste product made when your liver breaks down proteins.
  2. 6. To clean a liquid by straining out waste materials and extra fluids.
  3. 8. Harmful or poisonous to the body if allowed to build up.
  4. 9. A flexible, muscular bag that stores urine until you go to the bathroom.
Down
  1. 1. A essential liquid that the kidneys keep at a balanced level in your body.
  2. 2. A treatment using a machine to clean the blood when kidneys fail.
  3. 3. The liquid waste produced by the kidneys that contains water and urea.
  4. 4. Two thin tubes that carry urine from the kidneys down to the bladder.
  5. 5. The small tube that carries urine from the bladder out of the body.
  6. 7. Two bean-shaped organs in your lower back that filter waste from your blood.