What structure connects the cervix with the vagina?

The structure that connects the cervix with the vagina is indeed the cervix itself. The cervix is the narrow, lower portion of the uterus that opens into the vagina. Its primary function is to facilitate the passage of menstrual fluid from the uterus into the vagina and to serve as a birth canal during delivery. The cervix acts as a barrier that protects the internal reproductive organs from infection and can dilate during childbirth to allow the baby to pass through.

In this context, the other options do not serve as direct connectors between the cervix and the vagina. The amniotic sac protects the fetus during pregnancy but does not connect the cervix and vagina. The uterus holds the developing fetus but is located above the cervix. While the vagina is the canal itself, the cervix is the specific anatomical structure that connects the two. Therefore, identifying the cervix as the connecting structure is essential for understanding female reproductive anatomy.