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.
Each ureter enters the bladder through a tunnel in the bladder wall, which is angled to prevent the urine from running back into the ureter when the bladder contracts. A ureter is one of two uterine tubes that carry urine from the kidneys to the bladder.Each ureter is about ten to twelve inches long. Urine flows down partly by gravity, but mainly by waves of contractions, which pass several times per minute through the muscle layers of the urethral walls. ureter is one of two uterine tubes that carry urine from the kidneys to the bladder. Each ureter is about ten to twelve inches long.