U.S. Forest Service uses a machine called a masticator (also called a forestry mulching machine) to "chew" through brush and timber in order to clear firelines in advance of a wildfire. A cold press juicer uses the mastication process to extract juice from fruit and vegetable without the loss of oxygen or heat-sensitive nutrients as there is less friction involved. See also Biting Gnathology Muscles of mastication Horace Fletcher Chewing Gum Notes External links Dentistry Digestive system Articles containing video clips sk:Žuvacie svaly