oviduct


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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.
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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 ?
The expression of ER[alpha] was highest in the oviduct, followed by the uterus, mammary gland, spleen, stomach, and ovary, and lowest in the liver, lung, testis, spleen, and heart.
In the dorsal region, the oviduct opening showed the same histological appearance as the dorsal dense-layer epithelium (Fig.
In our work, atypical fish had a genital papilla which retained mainly its male form, with no obvious oviduct, but that could expel viable eggs after an abdominal massage (through a remaining male vas deferens or a quasi-oviduct near the tip of the papilla -based on observations made in our laboratory-), allowing us to use this trait to select potential sex-reversed females.
Zygotes were transferred to the mouse oviduct (approximately 5-7 per oviduct) at 20 hpi.
The RT-PCR was performed to examine the LIN28B expression profile in ten tissues, including the hypothalamus, pituitary, ovary, oviduct, uterus, liver, heart, kidney, lung and spleen.
The top differential diagnosis was a herniated oviduct containing a non-mineralized egg.
Hens were killed and the utero-vaginal junction of the oviduct were excised, soaked in PBS buffer and cleared without fat, connective tissue and adventitia.
Endometriosis is a common gynecological disease that widely involves the uterus, oviduct, ovary, intestinal canal, etc.6,7 Pain is the most common clinical manifestation of this disease.
Ovulation occurred when the mature oocyte passed through the lateral oviduct (Fig.