The role of the urinary system is to cleanse the blood. Arterial blood is filtered through the kidneys and returned to the circulation. Learn more about how the urinary system monitors the concentration of salts and other necessary nutrients.
Holding Hands Can Ease Pain
What makes your heart beat?
A Compendium of Fart Facts, Plus One Gaseous Podcast
Is it possible to get taller as an adult?
How Long Does LASIK Last?
'Man Flu' Could Be a Real Thing
The Lymph System
Take Care of Those Hammies
What is the function of the respiratory system?
When we've really got to urinate, kids and adults alike do the pee-pee dance. What are the theories behind the fidgeting?
By Jesslyn Shields Nov 16, 2017
If you find yourself running to the bathroom the minute you get home, experts posit this is a case of mind over bladder.
By Alia Hoyt Jun 27, 2017
Roller coasters: They're super fun, and they could help you pass a kidney stone without medical intervention. Who knew?
By Kate Kershner Sep 27, 2016
Currently, all organs in the U.S. are donated. A report says paying $45,000 per kidney donation would end waiting lists and save taxpayer dollars.
By Dave Roos Oct 29, 2015
"Pee on it" has long been the advice for a jellyfish sting or even a regular cut if nothing else is available. But is this really the best advice?
By Laurie L. Dove
Now and then, we all have to suppress nature's call, sometimes until it hurts. But could holding your pee for a long time have serious consequences?
The kidneys spend 24 hours a day, seven days a week filtering gallons and gallons of blood. But that's not all these little bean-shaped organs accomplish in a day.
By Craig Freudenrich, Ph.D.
The DEA Wants Your Old Drugs — Stat!
Mysterious New DNA Structure Found in Living Human Cells
Casting Han Solo Was Harder Than Blowing Up the Death Star