ABSTRACT
The cervix is the lower constricted segment of the uterus. Cervix
is divided into two portions, a supravaginal and vaginal portion
(portio vaginalis). Portio vaginalis is the portion of the cervix that
projecting into the vagina. The average size of portio vaginalis is 3
cm long and 2.5 cm wide. Supravaginal portio is separated in front
from the bladder by ibrous tissue known as parametrium that
extends from the sides between the broad ligaments. Posteriorly
supravaginal cervix is covered by peritoneum. The portion of the
cervix exterior to the external os is called ectocervix while the
passage between external os and endometrial cavity is referred
to the endocervical canal. Upper limit of the endocervical canal is
internal os (Fig. 8.1).
