http://yucky.discovery.com/flash/body/pg00012.html
Thursday, May 22, 2008
Urinary System
Your body makes chemical waste items that it can not use. Then it goes to the bloodstream to then go to the kidneys. Then the kidneys sepraet the waste from the stuff your body needs. when your bladder becames too full sends a message to your brain. you feel the need to pee and start looking for a place to pee.
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1 comment:
Yes! So the urinary system needs the nervous AND muscular systems to help it find a place to pee!
-- Marek
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