Digestion begins in the mouth where food is broken up by chewing. Teeth are set in both upper and lower jaws, held in place by gums which are dense fibrous tissues technically called gingivae. The teeth are equipment for cutting, tearing and grinding all healthy food that is not already liquid, with the food being moved about by muscular movements of the tongue.
The tongue is a muscular organ that moves portions of food around the mouth and towards the throat; it provides a sense of taste and help us to speak. The sense of taste is fully developed at birth. Sensations of taste arise from the activity of groups of specialized cells on the tongue
