The Visual Guide to
Equine Reproduction
Male Reproductive System: Accessory Sex Glands
Male Reproductive Tract.
The complete male reproductive tract is shown with the penis, the bulbo-urethral glands at its base, the seminal vesicles at the base of the bladder, the ampullae dorsal to the bladder, extending into the vasa deferentia leading to the testes on the right.
Drost M (1980)
Bulbo-Urethral Glands.
Openings of the bulbo-urethral glands as viewed with an endoscope inserted into the urethra of a stallion. Two rows of bulbo-urethral openings can be seen at the level of the ischial arch.
King AC (2008)
Colliculus Seminalis.
The colliculus seminalis can be seen as a median elevation, located dorsally, in the pelvic urethra. The two slit openings are the ejaculatory ducts where the joined ducts of the ampullae and vesicular glands enter the urethra. The external sphincter of the urethra, leading to the bladder, can be seen just past the seminal colliculus. The openings to the prostatic ducts are also visible at the upper right hand corner of this image, on the lateral wall of the urethra. The striated, reddened appearance of the urethra is normal and should not be confused with inflammatory processes.
King AC (2008)