. The anatomy of the domestic animals. Veterinary anatomy. 104 THE SKELETON OF THE HORSE face. The deep flexor tendon is inserted into the seniilunar crest and the central rough area behind it. The volar grooves and foramina transmit the terminations of the digital arteries into the semilunar canal, where they meet and form a terminal arch, from which branches pass through canals in the bone and emerge through the foramina on the dorsal surface. The angles or wings (Anguli) are prismatic masses which project backward on either side; the medial one is usually the shorter. Each is divided into u
. The anatomy of the domestic animals. Veterinary anatomy. 104 THE SKELETON OF THE HORSE face. The deep flexor tendon is inserted into the seniilunar crest and the central rough area behind it. The volar grooves and foramina transmit the terminations of the digital arteries into the semilunar canal, where they meet and form a terminal arch, from which branches pass through canals in the bone and emerge through the foramina on the dorsal surface. The angles or wings (Anguli) are prismatic masses which project backward on either side; the medial one is usually the shorter. Each is divided into upper and lower parts by a notch, or is perforated by a foramen which leads to the dorsal groove. "^ The proximal border carries the (cartilage. The cartilages of the third phalanx (Cartilagines phalangis tertite)- are rhom- boid curvetl jjlates which .surmount the angles on either side. They are relatively large and extend above the margin of the hoof sufficiently to be distinctly palpable. The abaxial surface is convex, the axial, concave. The proximal border is sinuous and thin; the distal is thicker and is in li, " ' I I'Vi'iiii'Wi '***'*w.«~. ,J^^ part attached to the wing. The anterior ^ ^V^m \ -^ij^J^ m ^^^'•^ ^*^ attached by ligament to the side of the second i)halanx. The posterior end curves toward its fellow at the heel, and is perforated by numerous for- amina for the passage of veins. It will be noted that the size and form of t he angles vary much in different specimens. In tlie new-born foal the angle is a small, piiiriii'd projection. Later the process of ossi- lii:iiinii invades the lower part of the car- lil;ii;c 111 a \ar\ iiiii I'xtriit. In si ime cases the Jill'III IT I i:i It nl' I hi' r:iii '^i' w o-silied—a con- (liliiin riinjniiinl\ iiTini-il ' >iili'l .; In the \'ouug suliject the carl ilage is liyaline, but later it changes to the fibrous type. Development.—The ossification of tlic liiird phalanx is peculiar. While (he
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectveterinaryanatomy
