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The internal orifice of the uterus (or internal orifice of the cervix uteri or internal os) is a 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.
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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
Female reproductive system |
Ovaries: Germinal epithelium | Tunica albuginea | cortex (Cumulus oophorus, Stroma of ovary) | Medulla of ovary
Follicles: Corpus luteum | Corpus albicans | Granulosa cells | Membrana granulosa | Corona radiata | Theca of follicle | Follicular antrum | Follicular fluid | Zona pellucida | Folliculogenesis/Oogenesis
Ligaments: Proper | Suspensory | Round | Broad (Mesovarium, Mesosalpinx, Mesometrium) | Cardinal
Fallopian tubes: Isthmus | Ampulla | Infundibulum | Fimbria
Uterus: cervix/neck (External orifice, Canal of the cervix, Internal orifice) | corpus/body (Cavity of the body, Fundus) | layers (Endometrium, Myometrium, Perimetrium)
Vulva: Mons pubis | Labium (Labial commissures, Frenulum labiorum pudendi, Labia majora, Cleft of venus, Labia minora, Vulval vestibule) | Clitoris (Clitoral hood , Clitoral glans, Frenulum clitoridis, Clitoral crura, Corpus cavernosa, Vestibular bulbs) | Vagina (Bartholin's glands, Skene's glands , Fossa of vestibule of vagina, Fornix vaginae, Hymen)
Breast: Mammary glands | Nipple | Areola | Lactiferous duct
G-spot | Urethral sponge
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