The human excretory system includes kidneys, ureters, urinary bladder, and urethra. Urine is produced by filtering waste products such as urea or uric acid from the blood in the kidneys.
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The human excretory system includes kidneys, ureters, urinary bladder, and urethra. Urine is produced by filtering waste products such as urea or uric acid from the blood in the kidneys.