Excretion and the Kidneys

http://www.biologymad.com/resources/kidney.swf

Your kidneys remove urea from blood, adjust ion levels in blood, adjust water levels in blood by filtering out unwanted materials and absorbing useful materials.

Click here to see an animation of the basic function of the kidneys

Click here to see if you can remember all of the labels of the nephron.

Click here to play a quick fire 'name a nephron' game, how fast can you label?

Ultrafiltration

Reabsorbtion in the nephron

Counter current multiplication

Instructional animation: excellent click here 

Animation: Showing how the kidneys create a concentration gradient that allows urine to become as concentrated as possible.

Here is a video explaining this concept again - this time using numbers!

Dialysis