orifice of the uterus in a sentence

1. The internal orifice of the uterus is an interior narrowing of the uterine cavity.
2. The external orifice of the uterus is a small, depressed, somewhat circular opening on the rounded extremity of the cervix, opening to the vagina.
3. A cervical cap fits over the cervix and blocks sperm from entering the uterus through the external orifice of the uterus, called the " os ".
4. A 1994 cervix repeatedly dipped into a pool of semen in the vaginal fornix, as if to ensure that sperm would proceed by the external orifice of the uterus, making conception more likely.
5. However, in women they may move onto the vulva and into the vagina, from there moving to the external orifice of the uterus, and onwards to the uterine cavity, fallopian tubes, ovaries, and peritoneal cavity.
6. It's difficult to find orifice of the uterus in a sentence.
7. They are drained by a pair of "'uterine veins "'on either side : these arise from the lower part of the plexuses, opposite the external orifice of the uterus, and open into the corresponding hypogastric vein.
8. It is triangular in shape, the base being formed by the internal surface of the fundus between the orifices of the uterine tubes, the apex by the internal orifice of the uterus through which the cavity of the body communicates with the canal of the cervix.