Disorders of the canine penis

摘要

The canine penis is made up of the root, body, and glans (Fig. 1). The root, or crura penis, is composed of the corpus cavernosum, covered by a thick tunica albuginea, and the ischiocavernosus muscle. It is adhered to the ischial arch between the ischial tuberosities.(16) The body, or corpus penis, is made up of two separate erectile bodies separated by a connective tissue septum. The urethra Lies ventrally within the body of the penis, enwrapped by the corpus spongiosum; the two sides of the penile body fuse at the base of the os penis.(16) The glans of the penis is made up of the bulbus glandis, a globoid or barrel-shaped expansion of the corpus spongiosum, and the pars longa glandis, which contains the os penis overlying the penile urethra.(16, 40) The major vessels supplying the penis are the internal pudendal and perineal arteries, and venous return is by the internal and external pudendal veins and the dorsal vein of the penis. Parasympathetic innervation, via the pelvic nerve, and sympathetic innervation, via the hypogastric nerve, are present.