Title: The anatomy of the domestic animals
Identifier: anatomyofdomesti01siss (find matches)
Year: 1914 (1910s)
Authors: Sisson, Septimus, 1865-1924
Subjects: Veterinary anatomy
Publisher: Philadelphia, London, W. B. Saunders Company
Contributing Library: The Library of Congress
Digitizing Sponsor: Sloan Foundation

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GENITAL ORGANS OF THE BULL 587 the extra-inguinal part of the cord is about eight to ten inches (20 to 25 cm.) in length. The cremaster extemus is well developed, and almost completely encloses the tunic to the neck of the scrotum; it is inserted about at the level of the upper pole of the testicle. The vaginal ring is relatively very small, and is about four inches (ca. 10 cm.) from the linea alba. The cremaster internus is feeble. The spermatic cords emerge through the lateral angles of the subcutaneous inguinal rings, and curve downward and inward to the neck of the scrotum. The rings are about four inches (ca. 10 cm.) long, and are two and a half to three inches (6 to 8 cm.) apart. In animals in good condi- tion there is a large mass of fat above the neck of the scrotum, between the spermatic cords. The niesorchium extends to the bottom of the tunica vaginalis, forming a narrow fold (ca. 1 cm. wide) which attaches the epididymis to the posterior part of the tunic. Vesicula seminalis Body 0/ prostate ^-vC^, '^
Text Appearing After Image:
Fig. 522.—General View of Genit.^l 0rq.\ns of Bul The inguinal canal presents several specia:! features in the bull. The abdominal ring is very- long. Its anterior border, formed by the edge of the internal oblique, is decidedly concave and is tendinous in its medial part. The long axis of the subcutaneous ring is directed outward, for- ward, and downiward. The spermatic cord lies in its lateral part, the external pudic vessels in its middle. A. muscular band about an inch wide, detached from the internal obhque muscle, crosses the lateral side of the vaginal ring. The ductus deferens is small in cahber and has a much thinner wall than that of the horse. At first it pursues a flexuous course upward along the posterior border of the testicle, then becomes straight and lies in the posterior part of the spermatic cord. The genital fold is narrow, so that the ducts are closer together in it than in the horse. On reaching the posterior part of the bladder they are in apposition for a chstance of about four inches (10 cm.), flanked and overlapped by the vesiculae seminales. They form ampullee about four or five inches (10 to 12 cm.) long and half an inch (1.2 to 1.5 cm.) wide, the mucous lining of which is plicated. They then pass under the body of the prostate and end, just medial to the ducts of the vesiculae seminales, as slit-like openings on either side of the colliculus seminalis. The vesiculae seminales are not bladder-like sacs, as in the horse, but are compact glandular organs wth a lobulated surface. In the adult they measure about four or five inches (ca. 10 to 12 cm.) in length, two inches (5 cm.) in width in

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