Final answer:
The cervix has three main functions: allowing menstrual fluid out of the uterus, allowing sperm to enter the uterus, and allowing babies to pass out of the uterus.
Step-by-step explanation:
The cervix has several functions in the female reproductive system. One of its functions is to allow menstrual fluid to leave the uterus and flow out of the body through the vagina. Another function is to allow sperm to enter the uterus during sexual intercourse, as the cervix connects the uterine cavity with the vagina. Finally, during childbirth, the cervix allows babies to pass out of the uterus and into the vagina to be delivered.