Cut through the penis with a scalpel. Identify the:

• tunica albuginea - the thick connective tissue surrounding the penis
• corpus cavernosum - the holes in this area are part of the arterial blood supply or sinus that fill with blood during erection. The veins are mostly located within the tunica albuginea and are not visible.
• corpus spongiosum - contains the urethra
• penile urethra - common pathway for semen or urine to exit the male