Humans are complex so in general if you remove
an important system, you won’t live very long.
This is certainly the case with the urinary
system. Urination plays a very important role in
what’s called homeostasis, which is the
body’s ability to stay stable.
Urine is produced when blood is filtered
through your kidneys. Blood needs to be
constantly filtered because it accumulates waste
with time. One example of accumulating waste
is creatinine, which is muscle waste.
Another example is urea which is a
waste product that comes from breaking down
proteins. Without your kidneys filtering blood
into urine, these waste products would just build
up and eventually be toxic to cells.
Additionally, your kidneys are like accountants
that make sure that all the salts are at
the right concentration in blood. This is why if
you drink a lot of water, you urinate a lot. Your
kidneys increase the rate of filtering blood to
make sure that the salts in your blood don’t get
too dilute. The opposite is also true in that if
you don’t drink a lot of water you don’t urinate a
lot because your kidneys decrease the filtering
Every cell requires specific conditions to
survive and carry out its function. The urinary
system is responsible for maintaining those
conditions in the blood that nourishes the cells.
That’s why kidney disease is so serious.
When the body loses its ability to set the right
concentrations of salts and other molecules, the
eventual result is cells dying. And of course, if
enough important cells die, the person will die as