The diseases of the genital The diseases of the genital organs of domestic animals diseasesofgenita01will Year: 1921 The Sheath and Prepxue 17 slowly yields and the preputial sac opens, after which the penis may be protruded. If the young animal is castrated early, the formation of the prepuce is held in abeyance at varying stages. The animal must then urinate within the sheath throughout life and is subject to special diseases not observed in entire males. In the young lamb, the urethral orifice at the tip of the vermiform appendix of the penis opens into the fundus of the sheath, the tip o
The diseases of the genital The diseases of the genital organs of domestic animals diseasesofgenita01will Year: 1921 The Sheath and Prepxue 17 slowly yields and the preputial sac opens, after which the penis may be protruded. If the young animal is castrated early, the formation of the prepuce is held in abeyance at varying stages. The animal must then urinate within the sheath throughout life and is subject to special diseases not observed in entire males. In the young lamb, the urethral orifice at the tip of the vermiform appendix of the penis opens into the fundus of the sheath, the tip of the vermiform appendix accordingly indicating the line of demarcation be- tween the sheath and the eventual preputial sac. Fig. 10—Sheath, Prepuce and Retracted Penis of Bull. F Fornix ; G, glans ; P, prepuce ; S, sheath. The epithelial coverings of the glans penis and the pre- puce of solipeds are corneous and highly protective. They produce a moist sebum in the sinus about the urethral open- ing, but over the rest of its surface the sebum is normally dry and forms gross masses of crusts which are readily detached. In ruminants, swine, and carnivora, on the con- trary, the preputial sac and glans penis are covered by a very delicate mucous membrane which normally secretes sufficient mucus to keep the parts constantly moist. The prepuce of ruminants and of swine is accordingly more vulnerable to abrasions and infections than that of solipeds, and affects quite profoundly the type of lesions observed in the two classes. The preputial secretions are not as a rule markedly odoriferous. The sheath of all domestic animals secretes a smegma having a specific odor. The boar has two culs-de-sac in the superior wall of the sheath which may contain as much as a
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