kidney - aqueous substances like blood , lypmh , drugs , etc. are purified here and thrown in the form of urine with the help of urinary bladder , urethra , ureters etc. in form of urine which consist of water , wastes , salts and uric acid .
intestine - food wastes are removed from our body .
liver - removal of urea , cholesterol , etc.
skin - removes , sweat and oil from our body .
lungs- removes carbon dioxide .