. Elementary biology, animal and human. Biology. 188 ANIMAL BIOLOGY example, have sharp cutting teeth (incisors) and grinding teeth (molars). Others, dogs, cats, lions, and tigers, have sharp pointed incisors and molars and in addition long canine teeth for tearing their food. In horses, cows, and other herbivorous animals the grinding teeth are especially developed, while canine teeth are either wanting or are relatively small. All these animals have four legs, but the relative size of the front and hind legs may differ greatly. In a kangaroo, for instance, the. JOstaearpal Sne* Fig. 137
. Elementary biology, animal and human. Biology. 188 ANIMAL BIOLOGY example, have sharp cutting teeth (incisors) and grinding teeth (molars). Others, dogs, cats, lions, and tigers, have sharp pointed incisors and molars and in addition long canine teeth for tearing their food. In horses, cows, and other herbivorous animals the grinding teeth are especially developed, while canine teeth are either wanting or are relatively small. All these animals have four legs, but the relative size of the front and hind legs may differ greatly. In a kangaroo, for instance, the. JOstaearpal Sne* Fig. 137. — Skeleton of the horse. hind legs are very large, while the front pair are so small as to be practically useless. Then, too, the nails on , the toes vary con- siderably. The fingers and toes of man are protected on a surface by nails. A horse has only one toe on each foot, and the nail for that toe is developed into a hoof. Cows and sheep have two toes on each foot similarly protected. On this account these mammals and others like them are called the hoofed Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Peabody, James Edward, b. 1869; Hunt, Arthur Ellsworth, joint author. New York, The Macmillan company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbiology, bookyear1912
