oviduct

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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.
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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 N3 stage, only found in adults prior to the first oviposition, was characterized by having ovarioles fully differentiated (typically having 3 to 4 developing follicles) with multiple ovarioles containing mature follicles, which had not yet ovulated as indicated by a lack of follicular relics in the distal portion of the lateral oviducts (Fig.
Illex) where spermatophores are stored inside the mantle cavity, mechanical activity mixes the eggs from the oviducts, the gelling agents from the nidamental and oviducal glands, and the broken spermatophores with water to form the substance of the egg mass.
There was a variable amount of free anechoic content on the coelomic cavity in 34 animals around the heart (Figure 1C); in 12 animals between the liver lobes (Figure 1F); and in 22 animals around the intestines, testis, oviduct, ovaries and bladder (Figure 3B).
In these birds, the prolapsed oviduct had varying degrees of tissue trauma, and in all cases, the birds appeared to be in hypovolemic shock.
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).
The dorsal type has the oviduct opening in a relatively dorsal position, with the vagina lying ventrally far from the oviduct.
We transferred two-cell embryos into the oviducts of foster mothers.
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.
Their oviducts and uterus internus appear as two cords of cells without apparent lumen.
Movement characteristics of hamster spermatozoa within the oviduct.
Two short lateral oviducts originate at the distal end of the ovaries and merge to form the median oviduct, which extends into the ovipositor.