One Kidney. . .

Do you know why we can live with only one kidney? Some people live with out a kidney, they live with one since they both do the same job and the blood travels through both, unless one is missing and the blood goes through just the one.
Kidneys, does any one know how they work besides doctors? Well here are the processes,
The blood goes to the kidney and into a capsule.
the capsule then takes all the waste, nutrients, and other materials out and separates, then puts the things the blood needs into it (like water, o2, and a little of protein).
Then the waste goes out of the capsule and into a tube. Now it’s called Urine.
The urine goes down the tube into the urinary bladder (bladder).
After the urinary bladder is full it goes to your nerves system and tells it needs to go and let the waste out, but it is actually not a bad thing at all, Gandhi drank his own pee and did not get sic from it.
The kidney and bladder is not the only thing that is a organ of the excretion system. The lungs, skin, and liver also do a major part of the system. The lungs give off co2 (carbon dioxide) and then takes in o2, (oxygen). The liver then breaks down proteins and giving them to the blood and taking the waste and not needed products to the kidney. The skin gives off perspiration and lets out harmful materials.