a) The food moves down from the mouth to the stomach through oesophagus.
b) The food is pushed further in the oesophagus by the action of circular and longitudinal muscles that constitute the walls of the food pipe. These muscles work involuntarily in coordination to produce wave like movements in the food pipe and are under the control of autonomous nervous system.
c) This action is known as peristalsis.
The movement of food down the food pipe from mouth to stomach.
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