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 ?
This plug degenerates when the ovum is ready to be released, thus allowing the egg to pass into the pedicel and thence into the lateral oviduct (Snodgrass 1935).
The reproductive system of a mature ommastrephid female consists of a single ovary, paired oviducts, and oviducal and nidamental glands.
The oviduct arises from the ovary and travels through the body as a straight tube of white color, internally lined by a cylindrical simple and ciliated epithelium, surrounded by a thick layer of circular muscle and connective tissue.
In one bird (case 14), the oviduct was preserved after surgery, and future breeding was successful.
Our research on artificial breeding revealed that, while a doe becomes more and more attractive to bucks during the 56-60 hours leading up to ovulation, there's a 36-hour overlap between follicle maturation and release of the egg into the oviduct.
2008) and by reducing weights of the ovary and oviduct of laying hens (Shini et al.
a) Includes 5 females with the 1st shelled egg of the clutch in the oviduct.
Statistical analysis: The concentration of progesterone hormones, variation of estrous cycle, changes of body weight before and after the experiment, and standard weight of the total reproductive system, left ovary and left oviduct, as well as the number, weight and CRL of newborns in different groups were analyzed by one-way ANOVA and post hoc Scheffe test using SPSS 11.
The dorsal type has the oviduct opening in a relatively dorsal position, with the vagina lying ventrally far from the oviduct.
Treatments were used: 1--powdery calcium carbonate with probiotic 2--calcium carbonate granules with Probiotic 3--calcium carbonate mixed with probiotic 4--powdery calcium carbonate without probiotic 5--calcium carbonate granules without probiotic 6--mixture calcium carbonate without probiotic to study the sight traits of test from every replication a chicken cervical destruction randomly, then by PH meter, PH crop, gizzard and intestines ceca were measured the body weight and the weight of internal organs such as the liver, ovaries, and oviduct was measured with a digital scale with an accuracy of 0.