. The anatomy of the domestic animals. Veterinary anatomy. THE HOOF 891. Fin, 714,—Recttox of Hoof ( ridgo formed bj' the junction of the frog with the bar and sole. This surface presents fine striae and openings for the papillie of the corium. The external or ground surface jiresents a central sulcus (Sulcus cimci), wliich is Ijounded l)y two ridges or crura (Crura cunei). The medial and lat- eral surfaces (Facies medialis et hit- criUis) are united at the upper part witli tlie bars and sole, but are free below and form the central wall of the deep collateral sulci (Sulci para- cuneati), whic
. The anatomy of the domestic animals. Veterinary anatomy. THE HOOF 891. Fin, 714,—Recttox of Hoof ( ridgo formed bj' the junction of the frog with the bar and sole. This surface presents fine striae and openings for the papillie of the corium. The external or ground surface jiresents a central sulcus (Sulcus cimci), wliich is Ijounded l)y two ridges or crura (Crura cunei). The medial and lat- eral surfaces (Facies medialis et hit- criUis) are united at the upper part witli tlie bars and sole, but are free below and form the central wall of the deep collateral sulci (Sulci para- cuneati), which are bomided out- wardly by the bars. The base (Basis ciuiei) is depressed centrally and prominent at the sides, where it unites with the angles of the wall; the junction here is covered by the ex]mnded periople and constitutes the bulb of the hoof (Pulvinus digi- talis). The apex (Apex cunei) oc- cupies the central angle of the con- ca'/e border of the sole, and forms a l)lvmt, round prominence a little in front of the middle of the ground sur- face of tlie hoof. Structure of the Hoof.—The hoof is composed of epithelial cells wliich are more or less completely keratin- ized except in its deepest part, the stratum germinativum; here the cjells have not undergone cornification, and by tiieir proliferation maintain the gro\\'th of the hoof. The cells are in part arranged to form tubes (Cylindri cornei) which are united bj' intertubular epi- thelium, and enclose medullary cells and air-spaces. The wall may be regarded as consisting of three layers. The external layer consists of the periople and tlie stratmn tectorium. The periople is composed of soft, non-pig- mented, tubular horn, and be- comes white when the hoof is soaked in water. It is contin- uous with the epidermis of the skin above, and extends do^^Ti- ward a variable distance. Usually it forms a distinct band somewhat less than an inch wide, except at the heels, where it is much wirier, and caps the angle of inflect
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectveterinaryanatomy
