The diseases of the genital The diseases of the genital organs of domestic animals diseasesofgenita00will Year: 1921 34 Diseases of the Genital Organs walls are intensely rigid and hard like cartilage. In rigid- ity the cervix is closely analogous to the oviducts. In func- tion, too, they are analogous: the one acts as a powerful guardian of the anterior, or peritoneal opening of the uterus; the other of the posterior, or vaginal portal. The cervix varies in size in the different genera and in individ- uals. The posterior end of the cervix projects into the vagina as an obtuse cone, li/2 to
The diseases of the genital The diseases of the genital organs of domestic animals diseasesofgenita00will Year: 1921 34 Diseases of the Genital Organs walls are intensely rigid and hard like cartilage. In rigid- ity the cervix is closely analogous to the oviducts. In func- tion, too, they are analogous: the one acts as a powerful guardian of the anterior, or peritoneal opening of the uterus; the other of the posterior, or vaginal portal. The cervix varies in size in the different genera and in individ- uals. The posterior end of the cervix projects into the vagina as an obtuse cone, li/2 to 2*4 inches in the mare and Fig. 15—Cervices of Virgin Heifers opened from above on the median line exposing the Annular Folds of the Mucosa. /, First or vaginal fold ; 2, 3, j, the second, third and fourth folds respectively. the cow. The cow has the longest and most powerful cervix: it is 3 to 5 inches antero-posteriorly and 2 to 3 inches transversely. Its muscular walls are so rigid, and its circular muscle fibres so contracted that it is exceedingly difficult to dilate the canal mechanically, but it dilates freely under the influence of estrum and parturition. The cervix of the mare is shorter than that of the cow and the walls far thinner and more pliable, rendering its canal readily dilatable.
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