**Uterine os** is an opening in the uterus that connects to the outside world through the cervix. Through this hole various secretions (mucus, blood) come out, as well as the baby during childbirth. The pharynx also serves as a protective barrier that protects the uterus from infection and other harmful influences.
The main functions of the uterine os are:
* Protecting the uterus from infections. The pharynx contains a layer of mucus, which has antiseptic properties and protects the uterus and cervix from infection. * Regulation of body temperature. Zev