Comparative Histomorphological and Histochemical Studies on the Oesophagus of Nile Tilapia <i>Oreochromis niloticus</i> and African Catfish <i>Clarias gariepinus</i>

<div>Photomicrographs of the cross section through the esophagus of Nile tilapia (a) and African catfish (b) showing extensive collagen fibres (C) in the tunica propria-submucosa extending to fill the core of mucosal folds and some bundles of the inner longitudinal layer (arrows) extended to the propria-submucosa in Nile tilapia and double-layered tunica muscularis made up from inner longitudinal (IL) and outer circular (OC) layers with intermuscular connective tissue mainly collagen fibres (arrows) in African catfish. Note the presence of tunica serosa composed of lamina subserosa (Ls) covered by lamina epithelialis serosa (Le). Crossman’s trichrome stain, ×200.</div>

Journal of Histology

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Figure 9

Figure 9: Comparative Histomorphological and Histochemical Studies on the Oesophagus of Nile Tilapia <i>Oreochromis niloticus</i> and African Catfish <i>Clarias gariepinus</i> 

Figure 9 | Comparative Histomorphological and Histochemical Studies on the Oesophagus of Nile Tilapia Oreochromis niloticus and African Catfish Clarias gariepinus 