الفهرس 
DEDICATION
Microscopic observationsOnly 14 pages are availabe for public view
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Abstract
The total length of both ceca in male goose was about 338.46 mm. It
represented 16.51% of the total intestinal length. While their weight
recorded 4.89 gm. It formed 10.35% of total intestinal weight.
- Asymmetry in the length and weight of each cecum was observed.
The right cecum was longer and heavier than the left one.
- The total diameter of each cecum indicated that the cecum was
narrower at the base than the remaining parts. The luminal diameter
of each cecum was the widest at the level of the apex then decreased
caudal wards. A reverse correlation was observed in the wall
thickness.
- The mean length of the colon was about 85.51 mm which
represented 4.17% of the total intestinal length. While its weight was
about 3.93 gm that constituted 8.32% of total intestinal weight.
- The base of the cecum had the highest villi which took different
shapes with well-developed lymph space filled most of the core of
the villi, the body had short finger like villi with moderate sized
lymph space and the apex had folds with small lymph space.
- The lining epithelium of the mucosa showed different staining
affinities, where there were dark and light cells. The microvilli of the
dark cells were short and numerous while that of the light cells were
long and few in number.
- The mitochondria were seen throughout the cytoplasm from the top
to the base of the cells. The mitochondria of light cell were arranged
in groups or clusters but those of the dark cell were scattered
diffusely in the basal part.
Discussion
318
- The goblet cells were numerous in number in the base of the cecum,
but decreased in number towards the apex. They showed PAS and
Alcian blue positive reactions as they have neutral and acid
mucopolysaccharides secretions.
- The apical and basal parts of the lining columnar epithelial cells of
the mucosa, crypts and submucosal glands of the cecum and colon
reacted positively to bromophenol blue stain.
- The apical part of the epithelium, lamina propria and part of the
submucosal glands revealed positive reaction to ATPase
histochemical stain.
- The rodlet cells from transitional to rupture stages were
demonstrated in the large intestine. According to the present electron
microscopic observations, the prerupture and rupture stages were
observed within the epithelium while the transitional stage was
demonstrated within the lamina propria.
- The enteroendocrine cells (closed type) were detected in the
epithelium, lamina propria and submucosal glands by light
microscopic investigation using Silver stain and in semithin section
using Toluidine blue stain.
- The telocytes were identified in various areas of the cecum and
colon. These cells were observed in the subepithelial lamina propria,
submucosa, around blood and lymph vessels, around cecal glands, in
contact to the nerves and in muscular layer.
- The muscularis mucosa was formed of circularly arranged smooth
muscle fibers towards the side of the submucosa. It gave smooth
muscle strands extending within the core of the villi.
Discussion
319
- Diffused lymphocytes were located within the epithelium, lamina
propria and submucosa. The lymphoid follicles were distributed
along the cecum, but they became aggregated and well developed at
the base of the cecum forming the cecal tonsils.
- The muscular layer composed of dark muscle fibers interrupted by
light ones and characterized by elastic fibers. At the level of the
iliocecocolic junction, the muscular layer formed of three layers in
addition a thickened layer of oblique smooth muscle fibers
positioned between the middle circular and outer longitudinalsmooth muscle layers.