occurs in the mouth to start mechanical digestion of food and is controled by the nervous syatem. By contrast, that occurs in the esophagus serves to move food along the Gl tract and is controlled by the nurvous systam. A. Chuming. somatici peristaibis; somatic B. Chewing; enteric; segmentation; somatic C. Chewing: somatic; peristalsis; enteric D. Churning; enteric; chewing; enteric.