the internal OS
It is the cervix.
Cervix
Cervix
cervix
The neck of the uterus is the cervix.
The cervix is the opening to the uterus, so you'd have to go through it to get to the uterus.
The cervix is the neck-shaped opening at the lower part of the uterus.
The neck of the uterus, which has a small opening and extends into the inner end of the vagina. The cervix is part of the uterus. The uterus looks like a bottle and the cervix is the neck. The cervix fits slightly into the vagina. Sperm have to travel through an opening in the cervix, into the uterus and then a little way into the Fallopian tubes. If the woman has ovulated, they should meet there in the tubes. The egg will travel further down into the uterus and the embryo will attach and embed into the uterine wall.
Cervix
The outer cervical os is the opening in the uterine cervix (the neck of the uterus) closer to the vagina. Its counterpart is the interior cervical os, which is opening in the cervix closer to the uterus.
The cervix is located inside a woman's vagina. The vaginal opening is an opening to the vaginal canal that leads to the cervix. The cervix is a tiny hole the shape of a doughnut that leads to a woman's uterus.
The cervix is the passageway between the vagina and the uterus. The opening is generally very small, but just enough to allow menstrual blood out, and semen in.In labor the contractions of the uterus cause the cervix to thin and dilate, so the baby can pass through the vagina and into the world.The function of the cervix is to allow flow of menstrual blood from the uterus into the vagina, and direct the sperms into the uterus during intercourse.