Your Stomach and Digestive Tract Author:Herbert Spencer Zim The stomach is perhaps the most familiar organ of the human body, but it is only one of the four used in the process of digestion. Here Dr. Herbert Zim describes the functions of all four organs - the mouth, the stomach, the small intestine, and the large intestine - explaining how this intricate system works and some of the things that can go w... more »rong with it.« less