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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612 GENITAL ORGANS OF THE BITCH GENITAL ORGANS OF THE BITCH The ovaries (Fig. 4-42) are small, elongated-oval in outline, and flattened. The average length is a little less than an inch (ca. 2 cm.). Each ovary is commonly situated a short distance (ca. 1-2 cm.) behind, or in contact with, the posterior pole of the corresponding kidney, and thus lies opposite to the third or fourth lumbar vertebra, or about half way between the last rib and the crest of the ilium. The right one lies between the right part of the duodenum and the lateral abdominal wall. The left one is related laterally to the spleen. Each is concealed in a peritoneal pouch, the bursa ovarii, which has a slit-like opening ventrally. The two layers which form this pouch contain a quantitj' of fat and unstriped muscle. They are continued to the cornu of the uterus, constituting the mesosalpinx and the ligament of the ovary. The surface of the ovarj' presents prominences caused by projecting follicles. Many follicles contain several ova. There is no distinct hilus. The uterine or Fallopian tubes arc small and average two or three inches (ca. 5-8 cm.) in length. Each passes at first forward in the lateral part of the bursa ovarii, and then runs backward in the medial part of the pouch; it is only slightly flexuous. The pouch is thus a part of the mesosalpinx. The fimbriated extremity lies chiefly in the bursa ovarii, but part of it often protrudes through the slit-like opening of the bursa ovarii; it has a rather large abdominal opening. The uterine orifice is very small. The uterus has a very short body and extremely long narrow horns. In a bitch of medium size the body is about an inch (ca. 2-3 cm.) and the cornua five or six inches (ca. 12-15 cm.) long. The horns are of uniform diameter, are nearly straight, and lie entirely within the abdomen. They diverge from the body in the form of a V toward each Iddney. Their posterior parts are united by the peritonemn. The neck is very short and has a thick muscular coat. Dorsally there is no line of demarcation between uterus and vagina, but the cervix uteri is much thicker than the vagina. Ventrally the cervix forms a cylindrical projection which lies in a depression of the vaginal wall. The mucous membrane of the uterus has long uterine glands and also short tubular crypts. The broad ligaments contain much fat and some unstriped muscle. They are much wider in the middle than at cither end. The posterior part is attached to the anterior part of the vagina. The round ligaments are contained in the free edge of folds given off from the lateral face of the broad ligaments. They are bands of unstriped muscle and fat. Each passes through the inguinal canal, enveloped by a peritoneal pouch (processus vaginalis). A ligamentous fold extends forward from
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Fig. 541.—Genital Organs of Bitch. Vulva, vagina, and uterus (in part) are slit open, a. Ovarian bursa: 6, same opened to sliow the riglit ovary, c; d, d, horns of uterus; e, e', body of uterus; /, neck of uterus: /', external uterine orifice; g, vagina; h, hymen; i, vulva; k, external urethral orifice; I, urinary bladder; m, urethra; n, n, labia vulvae; o, fossa clitoridis; p, central projection of fold of mucous membrane which con- ceals the cUtoria. (After EUenberger, in Leisering's Atlas.)

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