#excretory_organ__excretoryorgan__urinary_organ__urinaryorgan  an organ that separates waste substances from the blood and discharges them
  supertype:  #internal_organ__viscus  a main organ that is situated inside the body
  part of:  #urogenital_system
  subtype:  #flame_cell__flamecell  organ of excretion in flatworms
  subtype:  #kidney  either of two bean-shaped excretory organs that filter wastes (especially urea) from the blood and excrete them and water in urine; urine passes out of the kidney through ureters to the bladder

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