3 doctors weighed in:

Do blood and urine mix in the kidneys?

3 doctors weighed in
Dr. James Strader
Internal Medicine - Cardiology
2 doctors agree

In brief: Not usually

Urine is made from water and waste products the blood stream delivers to the kidneys.
In effect, the kidneys are giant filters, but the blood vessels pass through microscopic structures which do the filtering. The blood vessels and urine vessels do not mix; there is a thin layer of cells which separate the two, but allow the transfer of waste chemicals in the blood into the urine.

In brief: Not usually

Urine is made from water and waste products the blood stream delivers to the kidneys.
In effect, the kidneys are giant filters, but the blood vessels pass through microscopic structures which do the filtering. The blood vessels and urine vessels do not mix; there is a thin layer of cells which separate the two, but allow the transfer of waste chemicals in the blood into the urine.
Dr. James Strader
Dr. James Strader
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