. The anatomy of the domestic animals. Veterinary anatomy. Oil GENITAL ORGAN'S OF THE STALLION Structure of the Testicle and Epididymis.—The greater part of tlie surface of the testicle is covered liy a serous memlsrane, the tunica vaginalis propria, which is the visceral layer of the serous envelop of the cord and testicle; this is reflected from the attached border of the gland, leaving an uncovered area at which the vessels and nerves in the spermatic cord reach the testicle.^ Beneath this serous covering is the tunica albuginea, a strong capsule composed of dense white fibrous tissue and u
. The anatomy of the domestic animals. Veterinary anatomy. Oil GENITAL ORGAN'S OF THE STALLION Structure of the Testicle and Epididymis.—The greater part of tlie surface of the testicle is covered liy a serous memlsrane, the tunica vaginalis propria, which is the visceral layer of the serous envelop of the cord and testicle; this is reflected from the attached border of the gland, leaving an uncovered area at which the vessels and nerves in the spermatic cord reach the testicle.^ Beneath this serous covering is the tunica albuginea, a strong capsule composed of dense white fibrous tissue and unstriped muscle-fibers. When the tunic is cut, the gland substance, which is soft and reddish gray in color, protrudes. From the attached border and from the deep face of the tunica albuginea trabeculse and septa of connective tissue. "'^MUfcy Fig. 513.—Inguinal Region of Staluon, with Testicles Exposed. a, a'. Testicles: 6, scrotum, opened and reflected: c, tunica vaginalis communis, opened and reflected: d, reflection of tunica vaginalis enclosing scrotal ligament: f, tunica vaginalis propria (mesorchium): /, ductus deferens: g, g', tail of epididymis: h^ body of same; i, head of same: k, sinus epididymidis: /, spermatic vessels showing through tunica vaginalis propria: m, spermatic artery; ji, prepuce; n', raph^; o, preputial orifice. (After EUenberger-Baum, Top. Anat. d. Pferdes.) and unstriped muscle (Septula testis) pass into the gland and sulidividc the parenchyma into lobules (Lobuli testis). The larger trabeculse radiate from the attached border into the central part of the gland. A distinct mediastinum testis, such as is present in man and many animals, does not exist in the horse. The trabecule and interlobular septa form a network which shows no special conden- sation in any part of the gland. In correlation with this is the absence of a rete testis, formed by the anastomosis of the semmiferous tubules in the mediastinum. The spaces imperfectly marked ofT b
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