The ductus epididymis, composing the body and tail, and the ductuli efferentes that composes the head. Vas Deferens are lined by pseudostratified columnar epithelium. Surrounding the lumen is a dense, trilaminar muscle wall that aids in transport of spermatozoa to the ejaculatory duct. Prostate completely encircles the urethra and the ejaculatory duct at the base of the bladder. The parenchyma contains compound glands that empty into the prostatic urethra.
Prostate contains small, platelike concretions.
These prostatic concretions increase in size and calcify as the male ages. Eventually the gland may enlarge, blocking the urethra. Penis contains erectile tissue that is divided into three major cylinders, the corpora cavernosa penis and the corpus cavernosum urethrae.