The main filtering units of urinary system are nephrons. The Kidney consists of these units and hence may be called as the main filtering organ of urinary system..
Kidneys
in the human immune system the main function of the is filtering blood
nephron
How does the mascular system differ from the skeletal system?
heart
It traps it using a filtering system of hair and mucous.
spleen
BSA
differ in the way each elects its leader