. The anatomy of the domestic animals . Veterinary anatomy. 448 DIGESTIVE SYSTEM OF THE OX each side of the glosso-epiglottic fold. The muscles are well developed, and re- semble in general those of the horse; the hyo-glossus arises by additional portions from the great and middle cornua of the hyoid bone. The tongue is highly pro- tractile and is the chief organ of prehesion. THE TEETH 1 The formula of the permanent teeth of the ox is: / 0 0 3 3\ 2 I I - C - P - jNI - I = 32 / 0 0 3 3\ (I-C-P-jM-) = V 4 0 3 3/ The incisors are absent from the upper jaw. There are eight incisors in the lower j
. The anatomy of the domestic animals . Veterinary anatomy. 448 DIGESTIVE SYSTEM OF THE OX each side of the glosso-epiglottic fold. The muscles are well developed, and re- semble in general those of the horse; the hyo-glossus arises by additional portions from the great and middle cornua of the hyoid bone. The tongue is highly pro- tractile and is the chief organ of prehesion. THE TEETH 1 The formula of the permanent teeth of the ox is: / 0 0 3 3\ 2 I I - C - P - jNI - I = 32 / 0 0 3 3\ (I-C-P-jM-) = V 4 0 3 3/ The incisors are absent from the upper jaw. There are eight incisors in the lower jaw, arranged in a somewhat fan-like manner. They are simple teeth, without infundibulum. The crown is white, short, and shovel-shaped. The root is rounded, and is embedded in the jaw in such a manner as to allow a small amount of movement. There is a distinct neck. In addition to the simple numerical designation, the following terms are commonly applied to the individual teeth:. Fig. 3S3.—Incisor Teeth of Ox; Lingual Aspect. C. s., Caruncula sublingualis. central, first intermediate, second intermediate, and corner incisors. It is probable that the latter are much modified canines. The incisors of the adult ox do not •undergo continued eruption, as is the case in the horse; in old age, however, the gum retracts so that the roots are partly exposed and may come into wear.^ The deciduous incisors: differ from the permanent set chiefly in being much smaUer. The crowns are narrower and diverge more. The canines are absent (unless the fourth incisors be considered to represent them in the lower jaw).^ The cheek teeth (Figs. 134, 384) resemble those of the horse in number and general arrangement. They are, however, smaller, and also differ in the fact that they progressively increase in size from before backward. This feature is so marked that the first tooth is quite small, and the space occupied by the first three (i. e., the premolars) is only about one-half of that required f
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