The two muscles of mastication that that are involved in closing of the mandible are the masseter and muscles.

The two muscles of mastication that that are involved in closing of the mandible are the masseter and pterygoid muscles.

Actually, three muscles that work together are involved in movement of the mandible: Temporalis, Masseter and Pterygoid Muscles.

Temporalis muscle - assists in closing the mouth and moving the mouth from side to side during the chewing.

Masseter muscle- the main chewing muscle and one of the strongest muscles in the body.

Pterygoid muscles- with the Masseter muscle to assist in  the chewing action and jaw rotation.  

the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation:

gag reflex, poor dentition, gum retraction

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