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the excretory system

 
 
Reply Mon 16 Jan, 2012 09:27 pm
how do patterns in the excretory system repeat themselves to increase efficiency of the system as a whole?
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Type: Question • Score: 0 • Views: 3,341 • Replies: 1
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Butrflynet
 
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Reply Tue 17 Jan, 2012 12:02 am
@jasmini99,
Here's some reading material for you:

http://www.emc.maricopa.edu/faculty/farabee/biobk/biobookexcret.html

http://www.biology4kids.com/files/systems_excretory.html

http://www.uic.edu/classes/bios/bios100/lecturesf04am/lect21.htm

http://en.wikipedia.org/wiki/Excretory_system

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