peristalsis. The tongue just helps with moving the bolus (roundish ball of chewed food mixed with saliva) from the mouth cavity and into the oesophagus.
It is called deglutition.
Both have food that passes through it. The esophagus is a long narrow tube that pushes down food to the stomach. The stomach is a muscle covered sac that continuously churns food
Yes, the esophagus carries food from your mouth to your stomach.
Peristaltic movement.
As a simplified response, muscles in the tongue pushes food into the pharynx. However, it's a little more complicated than that. This address has good info on your question: http://www.nature.com/gimo/contents/pt1/full/gimo1.html
Peristalsis is the wavelike motion of muscles that pushes food downward through the digestive tract. It helps propel food and liquids from the esophagus to the stomach and through the intestines for digestion and absorption.
The organs that your food passes through pushes it along. E.g: The esophagus (aka: The gullet) squeezes and pushes the food down. That's why you can eat upside down without the food coming back up!
The esophagus takes the food from the mouth to the stomach. Food moves through the esophagus by peristalsis, which is muscle contractions the pushes the food downward. At the end of the esophagus is the lower esophageal sphincter (LES), which prevents food from re-entering the esophagus after it's reached the stomach.
The peristalsis which is a wavelike muscle contraction
The pharaynx!
The esophagus. Deeply lined muscle that almost contracts and pushes food down to the stomach
peristalsis is a muscle that helps food to get through the oesphagus