Vol 67, No 4 (2008)
Original article
Submitted: 2012-02-06
Published online: 2008-09-30
Gross anatomy of the intestine and its mesentery in the nutria (Myocastor coypus)
W. Pérez, M. Lima, A. Bielli
Folia Morphol 2008;67(4):286-291.
Vol 67, No 4 (2008)
ORIGINAL ARTICLES
Submitted: 2012-02-06
Published online: 2008-09-30
Abstract
The intestines and mesentery of the nutria (Myocastor coypus) have not been
fully described. In the present study 30 adult nutrias were studied using gross
dissection. The small intestine was divided into the duodenum, jejunum and
ileum as usual. The duodenum started at the pylorus with a cranial portion,
which dilated forming a duodenal ampulla. The ileum was located within the
concavity of the caecum and attached to the coiled caecum by means of the
iliocaecal fold. The ascending colon had two ansae, one proximal and one
distal. The proximal ansa was fixed to the caecum by the caecocolic fold. The
base of the caecum and a short proximal part of the ascending colon belonging
to the proximal ansa were attached to the mesoduodenum descendens.
The distal ansa of the ascending colon had a proximal part which was sacculated
and a distal part which was smooth. The two parts of the distal ansa of the
ascending colon were parallel and joined by a flexure of variable localisation.
The smooth part of the distal ansa of the ascending colon was attached to the
initial portion of the descending colon by a peritoneal fold. The short transverse
colon was directly attached to the mesoduodenum and greater omentum.
In conclusion, we have described the anatomy of the intestines of the
nutria and its mesentery in detail, and provided a nomenclature list adapted to
the Nomina Anatomica Veterinaria.
Abstract
The intestines and mesentery of the nutria (Myocastor coypus) have not been
fully described. In the present study 30 adult nutrias were studied using gross
dissection. The small intestine was divided into the duodenum, jejunum and
ileum as usual. The duodenum started at the pylorus with a cranial portion,
which dilated forming a duodenal ampulla. The ileum was located within the
concavity of the caecum and attached to the coiled caecum by means of the
iliocaecal fold. The ascending colon had two ansae, one proximal and one
distal. The proximal ansa was fixed to the caecum by the caecocolic fold. The
base of the caecum and a short proximal part of the ascending colon belonging
to the proximal ansa were attached to the mesoduodenum descendens.
The distal ansa of the ascending colon had a proximal part which was sacculated
and a distal part which was smooth. The two parts of the distal ansa of the
ascending colon were parallel and joined by a flexure of variable localisation.
The smooth part of the distal ansa of the ascending colon was attached to the
initial portion of the descending colon by a peritoneal fold. The short transverse
colon was directly attached to the mesoduodenum and greater omentum.
In conclusion, we have described the anatomy of the intestines of the
nutria and its mesentery in detail, and provided a nomenclature list adapted to
the Nomina Anatomica Veterinaria.
Keywords
animal anatomy; Rodentia; digestive system; peritoneal folds
Title
Gross anatomy of the intestine and its mesentery in the nutria (Myocastor coypus)
Journal
Folia Morphologica
Issue
Vol 67, No 4 (2008)
Article type
Original article
Pages
286-291
Published online
2008-09-30
Page views
619
Article views/downloads
1581
Bibliographic record
Folia Morphol 2008;67(4):286-291.
Keywords
animal anatomy
Rodentia
digestive system
peritoneal folds
Authors
W. Pérez
M. Lima
A. Bielli
About this article