. Human physiology : designed for colleges and the higher classes in schools and for general reading . a 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 mo
. Human physiology : designed for colleges and the higher classes in schools and for general reading . a 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. 4.
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Keywords: ., bookauthorhookerwo, bookcentury1800, bookdecade1850, bookyear1854
