The male reproductive system consists of both internal and external organs that work together to produce, maintain, and transport sperm and seminal fluid. The internal organs include the testes, which produce sperm and testosterone, and the seminal vesicles and prostate gland, which secrete fluids to create semen. The external organs are the penis and scrotum; the penis delivers semen during intercourse, and the scrotum houses the testes and helps regulate their temperature. Together this system allows for reproduction through the production of sperm and its delivery inside the female reproductive tract.