Springfield Nephrology Associates, Inc.

https://www.kidney.org/kidneydisease/howkidneyswrk

How Your Kidneys Work Why Are the Kidneys So Important? Most people know that a major function of the kidneys is to remove waste products and excess fluid from the body. These waste products and excess fluid are removed through the urine. The production of urine involves highly complex steps of excretion and re-absorptio...

A great resource:

National Kidney Foundation 30 million people in the U.S. have kidney disease but only 10% know it. NKF is a lifeline for all people affected by kidney disease—the largest public health issue you'll ever hear about.