View full lesson: http://ed.ted.com/lessons/how-do-your-kidneys-work-emma-bryce After drinking a few glasses of water on a hot day, you might be struck with a sudden ... urge. Behind that...
========== It's a hot day, and you've just downed
several glasses of water, one after the other. Behind the sudden urge that follows
are two bean-shaped organs that work as fine-tuned internal sensors. They balance the amount of fluid
in your body, detect waste in your blood, and know when to release
the vitamins, minerals, and hormones you need to stay alive. Say hello to your kidneys. The main role of these organs
is to dispose of waste products and to turn them into urine. The body's eight liters of blood
pass through the kidneys between 20 and 25 times each day, meaning that, together, these organs filter
about 180 liters every 24 hours. The ingredients in your blood
are constantly changing as you ingest food and drink, which explains why
the k...