The hand-book of household scienceA popular account of heat, light, air, aliment, and cleansing, in their scientific principles and domestic . so called from being large in thedog and carnivorous animals, and used by them to seize and tear theirfood ; G the hicuspids or double-speared, from their resemblance to adouble-headed canine tooth; and D the molars, double-rooted, withbroad, irregular, grinding surfaces.* 631. Conditions of the flow of Saliva.—But no amount of mechani-cal action alone will convert solid aliment into the fluid state. If thefood is to be dissolved, there mu
The hand-book of household scienceA popular account of heat, light, air, aliment, and cleansing, in their scientific principles and domestic . so called from being large in thedog and carnivorous animals, and used by them to seize and tear theirfood ; G the hicuspids or double-speared, from their resemblance to adouble-headed canine tooth; and D the molars, double-rooted, withbroad, irregular, grinding surfaces.* 631. Conditions of the flow of Saliva.—But no amount of mechani-cal action alone will convert solid aliment into the fluid state. If thefood is to be dissolved, there must be a solvent or liquid to bring aboutthe solution. It is the office of the saliva or spittle to commence thiswork. The saliva is separated from the blood and poured into themouth by three pairs of glands (Fig. 114). The rate at which it issecreted varies at different times and under different sight, or even the thought of dinner may fill the mouth with it,while continued mental attention to other subjects, or a state of anxi- *In Latin, cw«pi«signifies the point of a spear; oanie, dog; mo2a,amill; incisoranything which 882 PHYSIOLOGICAL EFFECTS OF FOOD Fio. 114.
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