part_of part of part of results in development of results in development of urogenital system development system development renal system development 2010-01-25T10:31:00Z GO:0072001 The process whose specific outcome is the progression of the renal system over time, from its formation to the mature structure. The renal system maintains fluid balance and contributes to electrolyte balance, acid/base balance, and disposal of nitrogenous waste products. In humans, the renal system comprises a pair of kidneys, a pair of ureters, urinary bladder, urethra, sphincter muscle and associated blood vessels. biological_process mah urinary system development urinary tract development renal system