How does the cervix connect the uterus with the vagina?

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Front view anatomical diagrams of the male and female reproductive systems, with labeled organs including penis, testis, prostate gland, uterus, ovary, and vagina. — human reproductive system Organs and structures of the male and female reproductive systems.

The cervix serves as the lowest region of the uterus and acts as the physical connection between the uterine cavity and the vagina.1

It facilitates this connection through the endocervical canal, a passage that runs the length of the cervix. This structure features two primary openings:1
* External os: The opening that connects the endocervical canal to the vaginal cavity.1
* Internal os: The opening that connects the endocervical canal to the uterine cavity.1

By providing this pathway, the cervix allows for the transport of sperm into the uterus and the passage of menstrual blood out of the body. During childbirth, the cervical walls relax and the canal stretches to permit delivery.1