Advice About Diet - Guide To Food Digestion

The Human Digestive System
What Is Digestion?

The human body obtains the energy and nutrients it needs from food. However, our cells cannot absorb these nutritional benefits until the food has been "digested" - meaning, "processed and converted into a useable form". Thus digestion is the complex process of breaking down food molecules into energy and other useful components, which can then be absorbed into the bloodstream and distributed throughout the body to maintain good health. Food remnants which are not absorbed during the digestion process are expelled as waste in the form of feces.

Where Do We Digest Our Food?

The digestion of food in humans takes place in the gastrointestinal tract - a series of hollow organs (mouth, esophagus, stomach, large and small intestines) connected to form a long tube of about 24 feet in length which extends from the mouth to the anus. It is also referred to as the GI Tract, the alimentary canal, the digestive tract, or the gut. Above the large intestine, the digestive system is sometimes called the upper gastrointestinal tract, while everything below is the lower gastrointestinal tract. The tract has muscular walls that propel food along the tube (a process called peristalsis) breaking it down and mixing it with digestive juices for optimum absorption.