Which of the following is not part of the mammalian male reproductive organ?

The vulva is not part of the mammalian male reproductive organ. The vulva is part of the female reproductive system, specifically the external genitalia. The epididymis, vas deferens, and testis, on the other hand, are all part of the mammalian male reproductive organ. The testis produces sperm and male sex hormones, while the epididymis and vas deferens are involved in transporting and storing sperm. In summary, the vulva is not part of the mammalian male reproductive organ. It is part of the female reproductive system, while the epididymis, vas deferens, and testis are all part of the male reproductive system.