Opposite of a patrilineal descent system is a matrilineal descent system, or a system of descent in which an individual's kin membership is traced through women.Again oversimplifying with some alliteration, it's one in which family descent is traced through the mamas!pposite of a patrilineal descent system is a matrilineal descent system, or a system of descent in which an individual's kin membership is traced through women. Again oversimplifying with some alliteration, it's one in which family descent is traced through the mamas!
Urethra: The urethra is the tube that carries urine from the bladder to outside of the body. In males, it has the additional function of ejaculating semen when the man reaches orgasm.When the penis is erect during sex, the flow of urine is blocked from the urethra, allowing only semen to be ejaculated at orgasm.rethra: The urethra is the tube that carries urine from the bladder to outside of the body. In males, it has the additional function of ejaculating semen when the man reaches orgasm.
The vas deferens transports mature sperm to the urethra, the tube that carries urine or sperm to outside of the body, in preparation for ejaculation. Ejaculatory ducts: These are formed by the fusion of the vas deferens and the seminal vesicles (see below). The ejaculatory ducts empty into the urethra.Urethra: The urethra is the tube that carries urine from the bladder to outside of the body.In males, it has the additional function of ejaculating semen when the man reaches orgasm. When the penis is erect during sex, the flow of urine is blocked from the urethra, allowing only semen to be ejaculated at orgasm.rethra: The urethra is the tube that carries urine from the bladder to outside of the body. In males, it has the additional function of ejaculating semen when the man reaches orgasm. When the penis is erect during sex, the flow of urine is blocked from the urethra, allowing only semen to be ejaculated at orgasm.