Uterus | |
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Image showing different structures around and relating to the human uterus.
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Details | |
Precursor | Paramesonephric duct |
Artery | Ovarian artery, uterine artery |
Vein | Uterine veins |
Lymph | Body and cervix to internal iliac lymph nodes, fundus to para-aortic lymph nodes, lumbar and superficial inguinal lymph nodes. |
Identifiers | |
Latin | Uterus |
Greek | Hystera |
MeSH | D014599 |
TA | A09.1.03.001 |
FMA | 17558 |
Anatomical terminology
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The uterus (from Latin "uterus", plural uteri) or womb is a major female hormone-responsive secondary sex organ of the reproductive system in humans and most other mammals. In the human, the lower end of the uterus, the cervix, opens into the vagina, while the upper end, the fundus, is connected to the fallopian tubes. It is within the uterus that the fetus develops during gestation. In the human embryo, the uterus develops from the paramesonephric ducts which fuse into the single organ known as a simplex uterus. The uterus has different forms in many other animals and in some it exists as two separate uteri known as a duplex uterus.
In English, the term is used consistently within the medical and related professions, while the Germanic-derived term is also commonly used in everyday contexts.
The uterus is located within the pelvic region immediately behind and almost overlying the bladder, and in front of the sigmoid colon. The human uterus is pear-shaped and about 7.6 cm (3 in.) long, 4.5 cm broad (side to side) and 3.0 cm thick. A typical adult uterus weighs about 60 grams. The uterus can be divided anatomically into four regions: The fundus – the uppermost portion of the uterus, the corpus (body), the cervix and the cervical canal. The cervix protrudes into the vagina. The uterus is held in position within the pelvis by of endopelvic fascia, which are called ligaments. These ligaments include the pubocervical, transverse cervical ligaments or cardinal ligaments, and the uterosacral ligaments. It is covered by a sheet-like fold of peritoneum, the broad ligament.