Penis

Leading away from each testis is a vas defrens tubule that will merge with the urethra directly below the urinary bladder. The urethra is encased in the penis, a tube made up of erectile tissues which transfers sperm into the female's body. The male reproductive system also consists of several accessory glands which secrete fluids to provide nutrients and a good environment for sperm (prostate, seminal, and Cowper's glands).