When it is not properly excreated from body & its accumulation takes place .
They should be excreted. They are converted to urea and excreated
By filtration through the kidney.
Kidney
Urea is removed in the kidneys and sent to the bladder.
in this the kidney contain less urea
Nitrogen waste in form of urea. This combines with water to form urine.
urea
The urea and water that make up urine are removed from the blood in the kidney. This is then passed on to the bladder which will be excreted as urine.
kidney
Urea
Urea is one of the substances in urine, and urine is in your blood stream until the kidney extract the urine from your blood.