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Cervix of uterus
Other Terms: Neck of uterus, Uterine cervix, Cervical canal, Cervical canal of uterus, Cervix uteri, Canalis cervicis uteri, Col de l'utérus, Canal du col utérin, Cervix der Gebärmutter
The cervix is the lowest of the three portions of the uterus and projects downward into the vagina through the upper end of the anterior wall. It is cylindrical in form and constricted at each end. Its surface may be divided into a supravaginal portion, a, zone of vaginal attachment, and an intravaginal portion. The supravaginal portion composes two thirds of the cervix anteriorly and about one-half of it posteriorly. Anteriorly it is in relation with the bladder, posteriorly it is covered by peritoneum, and laterally is attached to the broad ligaments and is in relation with the uterine vessels and the ureter. The anterior wall of the intravaginal portion is less than one-third of the anterior wall of the cervix, although on the posterior wall the intravaginal portion is one-half the length of the cervix. The intravaginal portion of the cervix is a cone-shaped body, the extremity of which presents the external opening of the cavity of the uterus, the external os. In the virgin the external os is a rounded opening, but after childbirth it takes the form of a transverse slit. A smooth mucous membrane, similar to that of the vagina, covers the intravaginal portion of the cervix.
Canalis cervicis uteri
Col de l'utérus
Canal du col utérin
Cervix der Gebärmutter