proventriculus

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proventriculus

[‚prō·vən′trik·yə·ləs]
(invertebrate zoology)
A sac anterior to the gizzard in earthworms.
A dilation of the foregut anterior to the midgut of Mandibulata.
(vertebrate zoology)
The true stomach of a bird, usually separated from the gizzard by a constriction.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Analysis of proventricular histological sections indicated that the submucosa contaided parasitic structures which pressed and atrophied the adenomeres adjacent to the parasite (Fig.
Biogenic amines have been shown to decrease feed efficiency (Brugh and Wilson, 1986; Stuart et al., 1986) and induce proventricular hyperplasia (Tucker et al., 1975), thereby compromising growth performance (Barnes et al., 2001).
In North America, birds infected with ABBV-1 have exhibited nonsuppurative inflammation of the central, peripheral and autonomous nervous systems and associated neurologic and gastrointestinal clinical signs, including proventricular stasis.
Proventricular dilatation diseases (PDD) is also termed as Macaw wasting syndrome was first recognized in the late 1970's in macaws imported into United States and Germany (Bouette and Taylor, 2004).
Reports differ on whether or not the inner surface of the proventriculus is toothed, and on what counts as teeth: one study claimed that absence of proventricular dentition is an autapomorphy of the Euphasmatodea (Tilgner et al.
Enzymatic digestion or absorption in this region is unlikely, because the proventricular cells, like those of the crop, did not exhibit characteristics of absorptive or secretory cells.
In present study the proventricular lesions (5.6%) including dilation of glandular acini were found in 1-40-day-old chicks.
Since DeRisi had previously identified viruses that cause a mysterious disease in parrots called proventricular dilatation disease, Hook suggested, perhaps he could help.
Segun SVENSON & WHITING (2004) forman un grupo monofiletico, basado en ciertos caracteres entre los que se encuentran: presencia de patas anteriores raptoriales, postclipeo bien definido, proyecciones cerca al apice de femures anteriores, perdida de un denticulo proventricular y fusion de los neuromeros abdominales II y III.