Most of what you eat is digested except for a few things such as insoluble and soluble fiber. It takes about 40-70 hours for food to pass from your mouth until the undigested food and other material pass as feces. Besides undigested foods a stool consists mostly of dead bacteria from the large bowel, mucus and dead cells from the intestine.
Here are links to a description of the digestive system and an animated video. You can find more information if you search for 'digestive system' using google.
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Re: does anyone know the answers to these poop questions?
