oviduct

(redirected from Oviducts)
Also found in: Dictionary, Thesaurus, Medical.
Related to Oviducts: culdoscope, Uterine horns

oviduct:

see fallopian tubefallopian tube
, 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.
..... Click the link for more information.
.

Oviduct

 

a female reproductive duct (usually paired) that serves mainly for the passage of mature eggs, or ova, that have formed in the ovary. The oviduct may be the direct continuation of the ovary (roundworms, arthropods, and echinoderms), or it may be completely isolated from the ovary. In the latter case, the oviduct opens anteriorly into the coelom and posteriorly into the cloaca (most vertebrates) or to the surface (annelid worms and mammals). Sexual funnels of annelid worms serve as the oviducts; most vertebrates have müllerian ducts, which develop from the primary renal duct. The oviducts of sturgeons and Holostei lie next to the ovaries. In most bony fishes the oviducts and ovaries are fused.

The egg is usually propelled through the oviduct by the contraction of the muscular walls or by movement of the cilia of the epithelium lining the cavity of the duct. The oviduct usually has various membranes. Its walls secrete coating substances; sometimes the substances are elaborated only by special regions of the ducts. For example, cephalopod mollusks have a special oviduct gland, and cartilaginous fishes have a shell gland.

The portion of the oviduct in which the eggs or embryos mature is called the uterus. Mammalian eggs are fertilized in the fallopian, or uterine, tubes, which are situated above the uterus. The terminal portion of the oviduct in organisms marked by internal fertilization (with the oviduct opening to the exterior) is called the vagina.

oviduct

[′ō·və‚dəkt]
(anatomy)
A tube that serves to conduct ova from the ovary to the exterior or to an intermediate organ such as the uterus. Also known in mammals as Fallopian tube; uterine tube.

oviduct

the tube through which ova are conveyed from an ovary
References in periodicals archive ?
For those females exhibiting regular estrous cycles, serum concentrations of progesterone and estradiol on the day of estrus were comparable across groups, as were the numbers of oocytes obtained from flushed oviducts (data not shown).
Oocyte lectin histochemistry: Some denuded oocytes of left oviducts on poly-L-lysine coated slides were placed in 10% buffered formalin solution as a fixator for 20 min and washed in PBS (phosphate buffered saline) solution (3 times, each 10 min).
Of the eight female Orchard Orioles that were collected from 30 May-5 June, four were SY and four were ASY; none had laid but one of the ASY females had her first egg in her oviduct, possibly suggesting earlier breeding by older females.
It is well documented that various parts of the avian eggshell are formed in specific regions of the oviduct as the egg passes through them.
Patients treated at HOPDs had lower odds of unexpected hospitalization after undergoing colonoscopy, debridment of skin and other tissues, arthroscopy, repair of inguinal hernia, laparoscopic cholecystectomy, and laparoscopic occlusion and fulguration of oviducts in the models that used both types of risk-adjustment.
The number of oocytes in the ovaries was estimated (as described above) and the number of ova in the oviducts were predicted from oviduct weight (Fig.
In this sense, the inner surface of the oviduct, as well as the oviductal fluid have drastic effects on the aforesaid biological processes.
The two eggs found together with the bones during the expedition might have been inside the oviducts of the Bonapartenykus female when the animal perished.
Oviducts of adults treated neonatally with genistein had abnormal morphology with gene expression patterns similar to that observed in the posterior cervical and vaginal tissues, as indicated by altered Hoxa gene patterning during the time of treatment and dramatic, permanent up-regulation of homeobox genes (e.
To elucidate further the role of NT4 in the female reproductive system and facilitate attempts to improve understanding of the mechanisms involved in infertility and embryo development, the presence of NT4 and TrkB in the ovaries, oviducts, and uteri of adult cows during the follicular and luteal phases was investigated.
Ovaries and oviducts were excised and weighed using a Mettler Toledo Analytical Balance (model AB54-S).
Five stages were noted: (1) Quiescent: no yolk deposition; (2) Yolk deposition: early vitellogenesis in progress with basophilic yolk granules; (3) Enlarged follicles > 5 mm; yolk filled follicles are approaching ovulation; (4) Oviductal eggs: ovulation has occurred; (5) Embryos are developing within the oviducts.