fallopian tube


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fallopian tube

(fəlō`pēən), either of a pair of tubes extending from the uterus to the paired ovaries in the human female, also called oviducts, technically known as the uterine tube. At one end the long, slender fallopian tube opens into the uterus; the other end expands into a funnel shape near the ovary. The epithelium that lines the tube is covered with cilia that beat continuously toward the uterus. When an ovum is expelled into the peritoneal cavity from the ovary during ovulation, it is propelled into the wide-mouthed opening of the fallopian tube, through the tube, and into the uterus by the wavelike motion of the cilia. If the ovum is fertilized, an event that normally takes place in the fallopian tube, and the embryo (fertilized ovum) implants in the tube, or another area outside the uterus, an ectopic pregnancy occurs. About 98% of ectopic implantations occur in the tubes, but other sites include the abdomen, ovary, and cervix. Immediate surgical removal of the products of conception is necessary to prevent hemorrhage and other complications resulting from ectopic pregnancy. The fallopian tubes are also the site of the most common surgical procedures used to prevent conception or cause infertility in women. Usually the tubes are tied off in a procedure known as tubal ligation, although they are also sometimes excised or occluded by other methods. See reproductive systemreproductive system,
in animals, the anatomical organs concerned with production of offspring. In humans and other mammals the female reproductive system produces the female reproductive cells (the eggs, or ova) and contains an organ in which development of the fetus takes
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; uterusuterus,
in most female mammals, hollow muscular organ in which the fetus develops and from which it is delivered at the end of pregnancy. The human uterus is pear-shaped and about 3 in. (7.
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.

Fallopian tube

The upper part of the female oviduct present in humans and other higher vertebrates. The Fallopian tube extends from the ovary to the uterus and transports ova from the ovary to the cavity of the uterus. Each tube is about 5 in. (12.5 cm) long; one lies on either side of the uterus and is attached at the upper portion. Each curves outward to end in a hoodlike opening, the infundibulum, with many fingerlike projections; the cavity of the Fallopian tube is continuous with the cavity of the coelom. The ovaries lie below and inside the tubal curve.

The ovum remains viable in the oviduct for about 1–3 days only. If fertilization occurs, the ovum moves into the cavity of the uterus and then implants on its wall. If fertilization fails to occur, the ovum degenerates in the uterus. Occasionally, a fertilized ovum fails to enter the uterus, or may be freed into the abdominal cavity, so that an ectopic pregnancy results if the ovum finds a site for implantation. See Reproductive system

Fallopian tube

[fə′lō·pē·ən ′tüb]
(anatomy)
Either of the paired oviducts that extend from the ovary to the uterus for conduction of the ovum in mammals.
References in periodicals archive ?
The first was a Phase 1/2 clinical trial (OSU-07022) for patients with metastatic ovarian, peritoneal and fallopian tube cancers using concurrent intravenous and intraperitoneal administration of REOLYSIN[sup.
Another woman had a fallopian tube removed instead of her appendix.
Female mammals have long, winding fallopian tubes, so a chemical trail there might fizzle out, Miki says.
This normal epithelium is characterized by simple columnar nonstratified epithelium with a mixture of the above 3 basic cell types, which tend to vary in number and distribution, depending on the anatomic region of fallopian tube and the phase of menstrual cycle.
In the normal course of events, fertilization of the egg occurs in the Fallopian tube.
Primary fallopian tube carcinoma is a rare tumour, comprising less than 2% of female genital tract malignancies.
Your doctor is correct in saying you should be able to conceive, even with only one fallopian tube, but your chances of doing this without help are reduced.
Research has shown that about 85 per cent of fallopian tubes blocked like this way could be cleared successfully using this method and, if there are no other causes of infertility, many women go on to conceive naturally.
Ectopic pregnancies occur in slightly more than one percent of all pregnancies and can present serious health problems if the fallopian tube ruptures.
Diagnostic pelviscopy indicated diffuse coalescence of both adnexes and edematous swelling of the fallopian tubes with severe postinflammatory changes (Figure).
Using a hysteroscope and catheter, a physician inserts a tiny coil mechanism into the vagina, through the cervix and to the proximal portion of each fallopian tube, where the coil is released; the device promotes tissue growth in the fallopian tubes that, over three months, provides tubal occlusion.
After a low level of radiofrequency energy has been delivered to a section of the fallopian tube, a small insert is placed through the body's natural openings.