Anatomical Study of The Stomach And Pyloric Caeca in Thalassoma Pavo (Linnaeus, 1758), From Northeastern Libya Jebel Akhdar Al Hamamah
Abstract
The aim of this study was to explain the anatomical aspects of stomach and pyloric caeca in (Linnaeus, 1758) were collected from Jebel Akhdar Al Hamamah. Ten adult individuals were collected. The length and diameter of stomach and the length, diameter and number of pyloric caeca were measured. Anatomical and histological study showed stomach is divided into anterior cardiac and posterior pyloric portions, while pyloric caeca is a finger-like straight organ. Histological specimens were and observed under light microscope. It was shown that pyloric caeca in Thalassoma pavo attached and formed a large mass between stomach and duodenum. the results show that the pyloric caeca are non-branched fingerlings structures numbering (13) and length rate was (0.3) cm The wall of pyloric caeca of main layers : mucosa ,submucosa , muscularis and serosa , lining epithelium of pyloric caeca were simple columnar consisting of enterocytes having goblet cells in between , goblet cells caeca , tunica submucosa was a thin layer of dense connective tissue , tunica muscularis consists of smooth muscle fibersarranged in two layers : internal circular and external longitudinal , tunica serosa was thin layer of loose connective tissue surrounded by mesothelium.
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