Cellulose is indigestible to humans because it acts as a hydrophyllic bulking agent to human feces. It is consist of non-starch polysaccharides. Its a soluble fiber, that's why cellulose is indigestible.
http://wiki.answers.com/Q/Why_is_cellulose_indigestible
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Although cellulose is indigestible by humans, it does form a part of the human diet in the form of plant foods. Small amounts of cellulose found in vegetables and fruits pass through the human digestive system intact.
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science.jrank.org/pages/1335/Cellulose-Cellulose-digest...
science.jrank.org/pages/1335/Cellulose-Cellulose-digestion.html
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Some of the Polysaccharides and cellulose are indigestible by humans.According to John Van der Veen, director of the division of nutrition at FDA's Center for Food Safety and Applied Nutrition, complex carbohydrates should make up about 55 percent of the calories in our daily diet, with fat making up 30 percent or less...
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dezeewierwinkel.nl/foodw.html
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.[Basic Organic Compounds in Living Things] ... -- contain the elements carbon, hydrogen, and oxygen (the hydrogen is in a 2:1 ratio to oxygen) ... cellulose -- indigestible in humans -- forms cell walls starches -- used as energy storage...
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www.ekcsk12.org/faculty/jbuckley/regbio/biochemnts.html
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N Much of this range land is covered with grass which contains cellulose, indigestible by humans. However, cattle can digest this grass, coverting it into beef and dairy products. Environment; Cattle Improve Grass & reduce erosion;
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www.ancw.org/CMDocs/ANCW/WOW%20that%20COW%20LOW%20RES%2...
www.ancw.org/CMDocs/ANCW/WOW%20that%20COW%20LOW%20RES%20Final.pdf
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But there’s one critical difference: the glucose molecules are linked in the beta configuration, which makes cellulose indigestible to humans (but not to many animals, which have the appropriate enzymes for the job).
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www.life-enhancement.com/article_template.asp?ID=1866
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Sally Fallon and Mary Enig explain what goes on in the long hollow tube. ... Chewing is an important first step in the digestive process, especially for fruits and vegetables, as it breaks down membranes of cellulose (indigestible for humans) and liberates the nutrients they surround.
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www.westonaprice.org/moderndiseases/digestion_primer.ht...
www.westonaprice.org/moderndiseases/digestion_primer.html
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Herbivores also have a variety of specialized digestive organs capable of breaking down cellulose, the main component of plant tissue. Humans find cellulose totally indigestible, and even plant eaters have to take their time with it.
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www.straightdope.com/columns/read/674/are-humans-meat-e...
www.straightdope.com/columns/read/674/are-humans-meat-eaters-or-vegetarians-by-nature
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Spending time at Brookford Farm taught me a lot about cows and dairying farming (where previously I knew nothing). I never knew that cows eat all the time. Seriously, they seem to be munching away continuously! But, now that I stop and think about it... ... But, now that I stop and think about it... ... One of the chambers (maybe its 2,
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www.flickr.com/photos/jdickert/539619332/
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