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An isthmus at the caecocolical junction is an anatomical feature of domestic and wild equids

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Abstract
The isthmus at the caecocolical junction in domestic equids is well described. Like another isthmus between the ansa proximalis coli (the colonic fermentation chamber or 'large colon') and the colon transversum (the distal or 'mall' colon), this spot represents not only a potential anatomical feature contributing to particle ingesta retention but also an explicit predilection site for intestinal obstructions. The question whether this anatomical feature also occurs in wild equids is therefore of both physiological and medical interest but has not been addressed so far. In this paper, we report dissections of the large intestine of a domestic pony (Equus caballus f. dom.), a Przewalski horse (Equus przewalski) and a plains zebra (Equus burchelli). The intestinal tract section of all three animals were similar in length; each species displayed the caecocolical isthmus as well as the abrupt narrowing of the intestinal tract between the 'large' and the 'small' colon. Graphical descriptions of wild equid gastrointestinal anatomy should include these features.
Keywords
colic, HORSE, digestion, caecum, anatomy, hindgut fermenter, tapir, Equus burchelli, Equus quagga, Equus przewalski, Equus caballus, Equus ferus

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Citation

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Chicago
Clauss, Marcus, Jürgen Hummel, Angela Schwarm, Patrick Steuer, Julia Fritz, Olga Martin Jurado, Anja Tschudin, and Jean-Michel Hatt. 2008. “An Isthmus at the Caecocolical Junction Is an Anatomical Feature of Domestic and Wild Equids.” European Journal of Wildlife Research 54 (2): 347–351.
APA
Clauss, Marcus, Hummel, J., Schwarm, A., Steuer, P., Fritz, J., Jurado, O. M., Tschudin, A., et al. (2008). An isthmus at the caecocolical junction is an anatomical feature of domestic and wild equids. EUROPEAN JOURNAL OF WILDLIFE RESEARCH, 54(2), 347–351.
Vancouver
1.
Clauss M, Hummel J, Schwarm A, Steuer P, Fritz J, Jurado OM, et al. An isthmus at the caecocolical junction is an anatomical feature of domestic and wild equids. EUROPEAN JOURNAL OF WILDLIFE RESEARCH. 2008;54(2):347–51.
MLA
Clauss, Marcus, Jürgen Hummel, Angela Schwarm, et al. “An Isthmus at the Caecocolical Junction Is an Anatomical Feature of Domestic and Wild Equids.” EUROPEAN JOURNAL OF WILDLIFE RESEARCH 54.2 (2008): 347–351. Print.
@article{668743,
  abstract     = {The isthmus at the caecocolical junction in domestic equids is well described. Like another isthmus between the ansa proximalis coli (the colonic fermentation chamber or 'large colon') and the colon transversum (the distal or 'mall' colon), this spot represents not only a potential anatomical feature contributing to particle ingesta retention but also an explicit predilection site for intestinal obstructions. The question whether this anatomical feature also occurs in wild equids is therefore of both physiological and medical interest but has not been addressed so far. In this paper, we report dissections of the large intestine of a domestic pony (Equus caballus f. dom.), a Przewalski horse (Equus przewalski) and a plains zebra (Equus burchelli). The intestinal tract section of all three animals were similar in length; each species displayed the caecocolical isthmus as well as the abrupt narrowing of the intestinal tract between the 'large' and the 'small' colon. Graphical descriptions of wild equid gastrointestinal anatomy should include these features.},
  author       = {Clauss, Marcus and Hummel, J{\"u}rgen and Schwarm, Angela and Steuer, Patrick and Fritz, Julia and Jurado, Olga Martin and Tschudin, Anja and Hatt, Jean-Michel},
  issn         = {1612-4642},
  journal      = {EUROPEAN JOURNAL OF WILDLIFE RESEARCH},
  language     = {eng},
  number       = {2},
  pages        = {347--351},
  title        = {An isthmus at the caecocolical junction is an anatomical feature of domestic and wild equids},
  url          = {http://dx.doi.org/10.1007/s10344-007-0126-y},
  volume       = {54},
  year         = {2008},
}

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