Posted by Anonymous on Sunday, September 28, 2008 at 5:39pm.
Thank you for using the Jiskha Homework Help Forum. Here are some helpful sites:
1. http://www.digitalfrog.com/resources/ont_frog11.html
2. http://www.utm.edu/departments/cece/old_site/seventh/7D3.shtml
3. http://www.questia.com/library/encyclopedia/digestive_system.jsp
5. http://answers.yahoo.com/question/index?qid=20080415134714AArowdh
Sra
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