Why is digestion important?
When you eat foods—such as bread, meat, and vegetables—they are not in a form that the body can use as nourishment. Food and drink must be changed into smaller molecules of nutrients before they can be absorbed into the blood and carried to cells throughout the body. Digestion is the process by which food and drink are broken down into their smallest parts so the body can use them to build and nourish cells and to provide energy. (from http://digestive.niddk.nih.gov/ddiseases/pubs/yrdd)
In the video below learn about the importance of healthy gut.