Stomach and Pyloric Sphincter Histology in Certain Microtine Rodents

Dearden, Lyle C.

doi:10.2307/1378630

Cited by 7 publications

(2 citation statements)

References 4 publications

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“…Within the antrum, the musculature is notably thick in the pyloric and adjacent proper gastric glandular regions and probably functions in milking digesta through the pyloric sphincter (Dearden, 1969) and isolating the pyloric glands from the remainder of the gastric antrum. The latter function may facilitate in neutralizing and manipulating the acidic digesta before entering the duodenum, in addition to reducing the feedback effects of the pyloric secretions on the proper gastric glands.…”

Section: Discussionmentioning

confidence: 99%

Digestive tract of the African giant rat, Cricetomys gambianus

Knight

Knight‐Eloff

1987

Journal of Zoology

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The study of gastrointestinal morphology, anatomy, passage rates and pH in the African giant rat, Cricetomys gambianus, were undertaken to elucidate the relationship between feeding habits and gut structure. The relatively slow transit times of digesta, suggested to be advantageous in digestion, probably resulted from a complex gastrointestinal tract. The prime function of the large papillated corpus and fornix ventriculi is thought to be starch digestion, while the caecum enhances the utilization of undigested food. Gut structure appears to be a result of a multitude of selective forces, not only dietary habits.

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Section: Discussionmentioning

confidence: 99%

Digestive tract of the African giant rat, Cricetomys gambianus

Knight

Knight‐Eloff

1987

Journal of Zoology

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“…With the exception of the epithelium, a typical mammalian stomach tissue plan (Dearden 1966(Dearden , 1969Madge 1975) was seen in M. albicaudalus. A thin serosa and muscularis externa comprising two smooth muscle layers, inner circular (stratum circulare) and outer longitudinal (stratum longitudinale), were present.…”

Section: Histologymentioning

confidence: 99%

A microscopical examination of the gastric morphology of the white-tailed ratMystromys albicaudatus(Smith 1834)

Maddock

Perrin

1981

South African Journal of Zoology

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A study of the gastric morphology of Mystromys albicaudatus revealed a sacculated stomach with a papillated, keratinized corpus separated from a distal glandular antrum by a pregastric pouch. Gastric morphology of this type is defined as bilocular hemiglandular. Although the forestomach of M. albicaudatus bears a superficial resemblance to that of a ruminant, the corpus (and papillae in particular) differ structurally and functionally from the rumen. Whereas rumen papillae are important in absorption, those of M. albicaudatus increase surface area for the attachment of symbiotic bacteria. S. Afr. J. Zool. 1981, 16: 237 -247 'n Studie van die gastriese morfologie van Mystromys albicaudatus het 'n sakvormige maagstruktuur getoon; 'n pregastriese sak het 'n met papillae uitgevoerde gekeratiniseerde corpus geskei van 'n distale klierryke antrum. Gastriese morfologie van hierdie tipe word gedefinieer as tweesakkig-hemigeklierd (bilocular hemiglandular). Alhoewel die voormaag van M. albicaudatus 'n oppervlakkige ooreenkoms toon met die van 'n herkouer, is die corpus (en die papillae spesifiek) struktureel en funksioneel verskillend van die rumen. Papillae van die rumen is belangrik vir absorpsie terwyl die van M. albicaudatus groter vashegtingsarea bied vir die simbiotiese bakteriese bevolking.S.-Afr. Tydskr. Dlerk.

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An anatomical, histochemical, and autoradiographic study of the ever‐growing molar dentition of Microtus with comments on the role of structure in growth and eruption

Oxberry

1975

Journal of Morphology

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An analysis of the microanatomy of the molar dentition of Microtus utilizing histological, histochemical and autoradiographic techniques reveals a complex architecture with distinctive morphogenic mechanisms which respond to the functional requirements of the organism. These mechanisms include; the maintenance of continued growth and eruption of the molars to compensate for continued hard tissue loss from wear at the occlusal surface of the crown throughout the entire lifespan of the orgainism and a positive feedback repair mechanism to protect the growth systems from the potential destruction this normal occlusal wear could initiate. An awareness and understanding of these phenomena is of significant value for interpreting palentological specimens and formulating a theoretical model for interpreting the evolution of Microtine molar dentitions.

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Stomach and Pyloric Sphincter Histology in Certain Microtine Rodents

Cited by 7 publications

References 4 publications

Digestive tract of the African giant rat, Cricetomys gambianus

Digestive tract of the African giant rat, Cricetomys gambianus

A microscopical examination of the gastric morphology of the white-tailed ratMystromys albicaudatus(Smith 1834)

An anatomical, histochemical, and autoradiographic study of the ever‐growing molar dentition of Microtus with comments on the role of structure in growth and eruption

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