What is the uteri cervix?

The uterine cervix, commonly referred to as the cervix, is the lower, narrow part of the uterus that connects to the vagina. It plays a critical role in reproductive health, serving as a passage for menstrual fluid to exit the body and for sperm to enter during conception. The cervix also acts as a barrier during pregnancy, helping to protect the developing fetus. Its structure includes both an internal os (the opening to the uterus) and an external os (the opening to the vagina).