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Internal orifice of the uterus

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Title: Internal orifice of the uterus  
Author: World Heritage Encyclopedia
Language: English
Subject: Uterus, Uterine cavity, Cervix, Cervical incompetence, Placenta praevia
Collection: Mammal Female Reproductive System
Publisher: World Heritage Encyclopedia

Internal orifice of the uterus

Internal orifice of the uterus
Posterior half of uterus and upper part of vagina.
Latin orificium internum uteri
Anatomical terminology

The internal orifice of the uterus (or internal orifice of the cervix uteri or internal os) is an interior narrowing of the uterine cavity. It corresponds to a slight constriction known as the isthmus that can be observed on the surface of the uterus about midway between the apex and base.

See also


This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

External links

  • Anatomy figure: 43:05-17 at Human Anatomy Online, SUNY Downstate Medical Center

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