. Human physiology : designed for colleges and the higher classes in schools, and for general reading. broad andirregular surface. The teeth are differently shaped in animals,according to the kinds of food which they eat. Thus, the her-bivorous, or vegetable-eating animals, have grinding teeth tobruise their food; while the carnivorous, or flesh-eating animals,have sharp-edged teeth and long-pointed teeth, by which theirfood is torn and cut in pieces. And it is to be observed, thatthe movement of the jaws always corresponds with the char-acter of the teeth. In the carnivorous animals, the moti
. Human physiology : designed for colleges and the higher classes in schools, and for general reading. broad andirregular surface. The teeth are differently shaped in animals,according to the kinds of food which they eat. Thus, the her-bivorous, or vegetable-eating animals, have grinding teeth tobruise their food; while the carnivorous, or flesh-eating animals,have sharp-edged teeth and long-pointed teeth, by which theirfood is torn and cut in pieces. And it is to be observed, thatthe movement of the jaws always corresponds with the char-acter of the teeth. In the carnivorous animals, the motion ofthe lower jaw upon the upper is a mere up-and-down, or hinge-like motion. As they have no grinding teeth, there is noneed of any lateral or grinding motion. But in the animalsthat have grinding teeth, there is a lateral motion, to enablethem to grind. You see this difference very plainly, if you ob-serve the dog and the horse while they are eating. In Fig. 3,you see represented the teeth of a carnivorous animal. Thefront teeth are long and pointed, for rending, while the back FIG. 3. FIG.
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Keywords: ., boo, bookcentury1800, bookdecade1860, bookpublishernewyorksheldon
