مقالههای Azza Essa
توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقالههای نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده میشوند.
۱Anatomical, Histological and Histochemical Adaptations of the Reptilian Alimentary Canal to Their Food Habits: II–Chamaeleon africanus
اطلاعات انتشار: World Applied Sciences Journal، سي ام،شماره۱۰، ۲۰۱۴، سال ۰
تعداد صفحات: ۱۱
The present study, which is a part of a series of comparative studies, aims to find out how the anatomical, histological and histochemical structures of the gut are related to the type of food. The anatomy, histology and histochemical of the alimentary canal of Chamaeleon africanus, a purely insectivorous reptile, was studied. The oesophagus of Chamaeleon africanus was a comparatively short tube. It contains oesophageal glands and is lined with ciliated columnar epithelium and goblet cells. The morphological limit between the oesophagus and stomach of Chamaeleon is accompanied by histological differences. The stomach contains mucous glands. The gastric mucosa is composed of simple columnar cells and many tubular glands. The small intestine is comparatively short and is not differentiated externally into duodenum and ileum. The duodenal mucosa is in the form of villi which unite forming a reticulum. The ileum opens into a short and wide rectum. The large intestine can be differentiated into a colon and a rectum. The lining of the large intestine was goblet and columnar absorptive cells. The rectum is provided with a small caecum as digestion takes place quickly by the strong digestive enzymes. Acid and natural mucopolysaccharides were detected in the gut mucosa. PAS positive matter is found in the entire alimentary tract. Proteins and nucleic acid is observed in the different regions of the alimentary canal.
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