The male reproductive organs include paired gonads, the testes, which produce both male gametes (sperm) and hormones;

paired gonadal duct systems, each consisting of an epididymis and deferent duct (ductus deferens), which convey the exocrine products of the testes to the urethra; a suite of accessory glands, which contributes the bulk of the semen; the male urethra, which extends from the bladder to the free extremity of the penis and serves for the passage of both urine and semen; the penis, the male copulatory organ, which deposits the semen within the reproductive tract of the female; and skin adaptations, the scrotum and the prepuce, developed in relation to the testes and the penis.