Food is the most important thing for the people, and food is digested and absorbed in our digestive system. In order to complete these two functions, the digestive system needs many different organs of the whole body to work together, including oral cavity, esophagus, stomach, small intestine, large intestine, liver and gallbladder. The following 9 truths about the digestive system may surprise you. 1. Eating does not depend entirely on [gravity] When we eat, food does not simply rely on gravity to go down through the esophagus into the stomach. When food enters the upper end of the esophagus through the oral cavity, the muscles of the esophagus will be stimulated, causing wavy peristalsis, pushing food along the esophagus through Read More …