oviduct

(redirected from Oviducal)
Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

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 ?
The reproductive system of a mature ommastrephid female consists of a single ovary, paired oviducts, and oviducal and nidamental glands.
The white accentuated oviducal gland of females was similar in appearance to the males' accentuated testis (see Males below), but it differed in shape, position, and frequency of expression (Fig.
By mid-June, most reproductive females had oviducal eggs, corpora lutea, or both.
In the oviducal gland, the fertilized egg is enclosed in a membrane; it then passes through the third membrane store chamber and enters the uterus.
Mature female reproductive tracts consisted of a well-developed right ovary (the only functional ovary in lamniform sharks) containing various sizes of ova, large oviducts and oviducal glands, and expanded, heavily striated uteri with thickened walls.
The smallest females observed,with oviducal eggs or large follicles were 48 mm SVL.
When oviducal eggs were detected, we brought the females into the laboratory to lay their eggs as per the methods described above for the female parent.
trachyderma, the oviducal glands and uteri enlarge when females mature at about 2000 mm TL.
1987, Role of oviducal secretions in mediating gamete fusion in anuran amphibians.