The cervix is part of the uterus, not a separate organ. The uterus is the whole muscular structure; the cervix is its lower narrow portion, opening into the vagina. Think of the uterus as an upturned pear and the cervix as its neck.
The core difference
- uterus — the whole organ. Also called the womb.
- cervix — its lower narrow end, connecting to the vagina.
The regions of the uterus
- Fundus — the rounded top, above where the fallopian tubes join.
- Body — the main cavity, called the corpus.
- Isthmus — the narrowing between body and cervix.
- Cervix — the neck, projecting into the vagina.
Why the distinction matters medically
Because the two regions have different tissue and different associated conditions. Cervical cancer and uterine cancer are separate diseases with separate screening: cervical screening samples cells from the cervix and is a screening test for a specific site, not a check of the whole organ.
The tissue differs too — the cervix has a transition zone where two cell types meet, and that zone is where cervical cancer typically arises.
The word cervix means neck generally
Cervix is simply Latin for neck, and it is used elsewhere in anatomy — the cervical vertebrae are the seven bones of the neck, which is why a cervical collar supports the neck and has nothing to do with the uterus. Two unrelated body parts share the word because both are narrowings.
Uterus, hysterectomy and hysteria
Uterus is Latin. The Greek equivalent is hystera, which gives hysterectomy — removal of the uterus — and, notoriously, hysteria. The latter came from the ancient and long-discredited idea that the uterus wandered the body and caused emotional disturbance. The word survives; the theory does not.
Womb is the older English word, from Old English wamb, which originally meant the belly generally.
This page explains the words, not your health. Anything specific is a matter for a doctor.
