The main organ of the urinary system is kidneys. (The ureters seems to be least important. Till kidney stone enters these tubes. Then you forget every thing and demand the relief from the pain. The kidneys will be damaged due to over dilatation if the tubes are blocked for long time.)
Kidney is the main organ of the urinary system. The unwanted substances are filtered from the blood by the kidneys and stored as urine in the bladder. This urine is passed out of body by urinary tract.
I don't know what the MAIN system is but the kidney is part of the urinary, endocrine, and the excretory, system. Probably more systems but I know its a part of those.
Urinary System
Source : Science -> Biology -> Human Philosophy -> Urinary System -> Kidney
The Bladder?
its the excretory system!.
the digestive system
The excretory system.
kidney
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urinary system
Kidney is an organ of our body. The Kidney is an important Excretory organ in the body which helps in separating waste matter from the blood stream and purifies blood by helping in passing of urine.
The Kidney
It affects the kidney.
The loop of henle (kidney)