Which uterine structure forms the narrow passage to the vagina?

• A. Vagina
• B. Ovaries
• C. Cervix
• D. Fundus

Answer: (C)

The cervix serves as the gateway between the uterine cavity and the vagina, forming the narrow passage called the cervical canal. The cervix is the lower, connecting portion of the uterus, and its canal runs from the internal os (opening to the uterus) to the external os (opening into the vagina). The vagina is the external canal leading to the outside, the fundus is the upper dome of the uterus, and the ovaries are separate reproductive organs. Thus, the cervix is the structure that creates the narrow passage to the vagina.