Mouth has both chemical and mechanical digestion because of the teeth and the amylase in saliva.

After the food is ready for thorough digestion it goes through the esophagus. A tube that goes down your throat and into your stomach. During transition from mouth to stomach it goes through a process called, peristalsis. Peristalsis is a movement in which muscles contract and expand around the food to help break it down before digesting and dividing into the stomach.