The following link is a news letter with this weeks information entitled "The Colon".

At the bottom of this page is a link to each of the previous subjects in the series of the digestive system.

"And now we are ready to conclude our series on the intestinal tract. Several months ago, we began at the top of the tract, in the mouth. We followed our meal step-by-step as it moved on down the esophagus into the stomach where initial digestion began. We then moved into the duodenum and the small intestine where digestion was completed and absorption took place. Now, in this newsletter, we turn to the large intestine, or colon, which absorbs any remaining water in the feces and transfers them to the rectum for excretion. As part of our exploration, we will also explore the various reflexes that move feces into and through the colon. And finally, we will conclude by examining the complicated anal sphincter muscle that controls passage through the anus and then discussing the physiology of defecation. Along the way, we will also explore those things that can go wrong in the colon -- from colon cancer to diverticular disease -- and the options you have to correct them."

http://www.jonbarron.org/baseline-health-program/2010-04-12-the-colon.php

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I think anybody with any problems related to the digestive system will find this information useful.