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Quick Answer. Four muscles are used to chew food. They are the masseter, temporalis, medial pterygoid and lateral pterygoid. These muscles are responsible for the chewing action, moving the mandibles from side to side, grinding teeth and even helping us speak. They are also referred to as muscles of mastication..
The process of swallowing is known as deglutition. The act of swallowing can be divided into three stages for easy understanding. 1. Oral stage: This is the only voluntary stage in the act of swallowing. It consists of: Mastication of food making it into a bolus fit to be swallowed. The main muscles involved in the act of chewing are: a. Masseter.