Urine is made the occurrence of
processes in the :
glomerular filtration, tubular
and tubular secretion.

the nephron the carried by the
arteriole enters the
capillary network where is filtered.
The implies that part the
blood returns the circulation through
efferent arteriole and other part,
known glomerular filtrate, enters
proximal tubule of nephron. In
the tubules (also known
convoluted tubules) substances the
glomerular filtrate water, ions and
organic molecules are by
the cells tubule wall and
again the circulation. cells also
secrete substances inside the
. The urine is of not
resorbed substances and of
(by the tubules) .
Urine is drained the collecting ducts
the ureter of kidney, then it
the bladder and it is
discharged the urethra.

The tubules are surrounded
an extensive capillary that
collects resorbed and
provides others be secreted.