The male reproductive system consists of the spermatic cord, testis, epididymis, accessory sex glands and the penis.  The testis produces spermatozoa and testosterone, as well as other substances such as inhibin, estrogen and a variety of  proteins.  The epididymis provides the environment for final maturation of spermatozoa and serves as a storage organ for these cells.  The accessory sex glands produce seminal plasma and the penis is the copulatory organ.