The Penile Cavernous System and Its Morphological Changes in the Erected State in the Dog

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Abstract
With the aid of the acrylic resin casting method and by scanning electron microsopy, the cavernous system of the canine penis was studied. The configuration of the erected penis was compared to that of the non-erected penis. The glans was especially well developed, consisting of the pars longa glandis and the bulbus glandis. The corpus cavernosum penis was poorly developed. In all specimens observed, the glans was provided with a vein (Christensen''s deep vein of the glans) which was located between the pars longa glandis and the bulbus glandis. In the erected condition of the penis, the glans remarkably expanded, accompanied by proportional engorgement of its cavernous spaces, but the corpus cavernosum penis did not expand regardless of swelling of its cavernous spaces. Many circular furrows were present in the cavernous spaces of the erected glans. These furrows were considered to be images of the collagenous bundles in the trabeculae of the glans.

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