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() is the lower part of the
human female reproductive system
. In a non-pregnant woman, the cervix is usually between 2 and 3 cm long and roughly cylindrical in shape. The narrow, central
runs along its entire length, connecting the
. The opening into the uterus is called the
and the opening into the vagina is called the
. The lower part of the cervix, known as the
vaginal portion of the cervix
(or ectocervix), bulges into the top of the vagina. The cervix has been documented anatomically since at least the time of
, over 2,000 years ago.
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