The exterior of the horse . Fig. 2S9.—Incisors exposed by their ante-rior face to show their relative inclinationtowards the median line. 2d. Direction in Relation tothe Median Plane.—In the younganimal (Fig. 289), in consequence oftlie greater extent of the arcadesformed by the surfaces of frictionelongated transversely, and also onaccount of the lateral flattening of theroots, the incisors all appear to beconvergent at the level of their , however, do not remain the progress of age the crownof the tooth is little by little wornoff, at the same time that the maxil-lary
The exterior of the horse . Fig. 2S9.—Incisors exposed by their ante-rior face to show their relative inclinationtowards the median line. 2d. Direction in Relation tothe Median Plane.—In the younganimal (Fig. 289), in consequence oftlie greater extent of the arcadesformed by the surfaces of frictionelongated transversely, and also onaccount of the lateral flattening of theroots, the incisors all appear to beconvergent at the level of their , however, do not remain the progress of age the crownof the tooth is little by little wornoff, at the same time that the maxil-lary bones push them out farther andfarther from their alveolar the combined influence ofthese two causes the roots, which atfirst were almost contiguous, aregradually separated from each other,and draw towards the entrance ofthe alveolus, while the tables dimin-ish in width transversely. The evolution of these facts hasfor its result a modification of theprimitive direction of the incisors :their axis is slowly se
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Keywords: ., bookcentury1800, bookdecade1890, booksubjecthorses, bookyear1892
