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The intestinal tract in an average adults is about nine meters (30) feet long and is divided into a number of different parts. Each parts of the intestinal tract has its own job to do.
Semi digested food passes from the stomach into the small intestine where another set of enzymes completes the digestive process. The resultant tiny particles are absorbed into the wall of the intestine.
By the time food reaches the end of the small intestine and is about to enter the part of the intestinal tract known as the large bowel, it is little more than waste residue. Water is removed in the colon and mucus is secreted to help the stools pass easily along to the exit point, but the actual digestive process has finished much earlier on.
How the stomach works.
Your stomach helps digest food in two ways. First, the cells of the stomach lining produce something like three liters of gastric juice every day. Of the different substances which make up these juices, the most important one is probably hydrochloric acid which is produced by the parietal cells. These exist in the stomach wall in a total population of something approaching a billion.
The power and effects of these juices is enhanced by the stomach’s muscular wall which churns the food and the juices together before squirting the resultant soup like misture through a valve into the next part of the intestinal tract, the duodenum.
It is these properties of the stomach which give power as a digestive force and there are a number of different factors which can influence both the production of acid and the activity of the stomach’s muscular wall. Of these factors, the two most important in a normal stomach are the presence and absence of food.