What is the function of the cervix in the female reproductive system?

The cervix serves as the opening to the uterus, which plays a crucial role in the female reproductive system. It acts as a passageway between the vagina and the uterus and has several important functions during the different stages of a woman's reproductive life. During menstruation, the cervix allows the menstrual flow to exit the body. During pregnancy, it closes tightly to protect the fetus and maintain a suitable environment within the uterus. Furthermore, during labor, the cervix dilates to allow for the passage of the baby. Its structural and functional characteristics are specifically designed to facilitate these processes, making this answer accurate and relevant to understanding the female reproductive anatomy and functions.

The other options do not correctly describe the role of the cervix. The cervix is not a conduit for the fallopian tubes, does not store eggs (as ovaries do), and is not the site of fertilization (which occurs in the fallopian tubes).