March 8, 2011
The human digestion system consists of a series of organs and glads that process the food that we eat. The digestion process starts when food enters the mouth, then with the chewing of food. The salivary glads help break down the food with enzymes so that it is easier to swallow. While the food is being chewed it is turned into bolos, which then travels down the pharynx and through the esophagus. The esophagus is the long tube that runs from the mouth to the stomach. After the food reaches the stomach it is partially digested and mixed with the stomach acids called chyme.
Food normally takes between two and six hours to digest depending on what is eaten and the size of the meal. After the food leaves the stomach it enters the small intestines, there are three parts of the small intestines, the duodenum the jejunum and the ileum. While food is traveling through the small intestines bile from the liver that has been stored in the gallbladder helps with fat digestion and absorption. The enzymes from the pancreas help in breaking down the food. In the small intestines food is transferred to the large intestines where water, electrolytes and vitamins are removed from the food and absorbed by the body. Food that is not absorbed by the body travels through the large intestines to the colon and then to the rectum where our body disposes of what the body no longer needs.