The digestive system is quite simple and straightforward, but its many components and parts add to its profound complexity. The whole system is a bodily miracle/feat that allows the body to survive through many facets of its design and function.
Starting from our oral cavity, food is taken in and already begins to be broken down by the saliva and other peptides. Down the pharynx the bolus travels by peristalsis. In the stomach, bile and other enzymes that are released primarily from the pancreas help break down the various kinds of foods being digested.
Into the small intestine via the pylorus sphincter the chyme travels. The peptides and other enzymes that break down the carbs and fats will allow the microvilli along the walls of the small intestine to carry nutrients away from the tract. The whole tract, including the small, and large intestines, with the stomach, and the throat, all amounts to about 3 table lengths, even longer when completely unraveled and stretched out.
After the small intestine, the remaining by products are moved into the large intestine, where water reabsorption is largely conducted, and then finally excreted from the body.
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