Every contemplated selling your kidneys to pay for something expensive like college? 

Maybe you should think again. Kidneys are 2 purple-brown bean shaped organs next to your spine. Kidneys are about the size on a fist and are vital to the body, one of our most important organs. Kidneys main job is to produce urine allowing the body to excrete waste. This keeps the body healthy, a build up of this waste can cause death. 

Kidneys also help with blood pressure control and red blood cell production. Humans can live without on of their kidneys but if both are gone dialysis is required daily. This machine cleans the blood and removes waste. If one kidney is removed or dies the other enlarges to do more work. 

The average set of kidneys filter 50 gallons of blood every day using 2 million tiny little blood filters.