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 bladder is connected to the urethra, which delivers the urine to the outside of the body. The primary function of the urinary tract system is to remove substances from the blood, to form urine and help to regulate various metabolic processes. (Click an organ above to see its description.). Ureter. Function The ureter is a thick-walled tube leading from each kidney, which carries urine to the bladder. Urine flows down partly by gravity, but mainly by a wave of contractions, called peristalsis, which pass several times per minute through the muscle layers of the urethral walls.