Male Reproductive Tract.
Complete reproductive tract of the bull showing the testes, accessory sex glands and the penis. The tunics of the left testis have been opened to show the epididymis. The fibroelastic penis shows the sigmoid flexure and the retractor penis muscles. Of the accessory sex glands the lobular seminal, vesicular glands are readily visible at the base of the (empty) bladder. The ampullae, the dilated portions of the vasa deferentia are also shown dorsal to the bladder. The prostate gland is not visible. The annular portion is located just posterior to the confluence of the seminal vesicular glands and the disseminate portion lies along the root of the penis. The bulbourethral glands are also not visible they are surrounded by the red bulbourethral muscles at the base of the penis.
Drost M (1980)