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The cervix (pl.: cervices) or cervix uteri is a dynamic fibromuscular sexual organ of the female reproductive system that connects the vagina with the uterine cavity. [1] The human female cervix has been documented anatomically since at least the time of Hippocrates , over 2,000 years ago.
The cervix is the neck of the uterus, the lower, narrow portion where it joins with the upper part of the vagina. It is cylindrical or conical in shape and protrudes through the upper anterior vaginal wall. Approximately half its length is visible, the remainder lies above the vagina beyond view.
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The opening to the human vagina lies just below the urethral opening at the back of the vestibule. A 1996 study by Pendergrass et al. using vinyl polysiloxane castings taken from the vaginas of 39 Caucasian women, found the following ranges of dimensions: [3] lengths (measured using rods): 6.9 to 14.8 cm (2.7 to 5.8 in);
The human vagina is an elastic, muscular canal that extends from the vulva to the cervix. [9] [10] The opening of the vagina lies in the urogenital triangle. The urogenital triangle is the front triangle of the perineum and also consists of the urethral opening and associated parts of the external genitalia. [11]
Cervical dilation (or cervical dilatation) is the opening of the cervix, the entrance to the uterus, during childbirth, miscarriage, induced abortion, or gynecological surgery. Cervical dilation may occur naturally, or may be induced surgically or medically.
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Its oblique roof is the pelvic inlet (the superior opening of the pelvis). Its lower boundary is the pelvic floor . The pelvic cavity primarily contains the reproductive organs , urinary bladder , distal ureters , proximal urethra , terminal sigmoid colon , rectum , and anal canal.