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The stomach of three species of non-human primates was investigated by lectin histochemistry to clarify the staining affinity and distribution patterns of their sugar residues. All gastric regions, with little differences between the deep and superficial parts of the same region, were rich in. in N-acetylglucosamine and/or neuraminic acid. Although, the superficial regions of the gastric mucosa were scanty in N-acetylgalactosamine, a-D-glucose and a -D-mannose, the deep parts of the gastric mucosa were rich in these sugars. In conclusion, there is a difference among the mucosubstances of surface and foveolar mucous cells, mucous neck cells, and gastric gland cells. This indicates heterogeneous composition of gastric mucus, or mucus molecules with variations in the degree of glycosylation of their oligosaccharide chains in the different cells which suggest that lectin binding affinity in the gastric mucosa correlated mostly to the degree of cellular differentiation.

Different lectins conjugated either to horseradish peroxides (HRP) or fluorescein isothiocyanate (FITC) were used to detect sugar residues of the epithelial glycoprotein in the gastric mucosa of the one humped camel (Camelus dromedaries). All mucus secreting cells were rich in oligosaccharides with terminal galactose (Gal), N-acetylgalactosamine (GaINAc), N-acetylglucosamine (GIcNAc), and neuraminic acid residues while-L-fucose (a-L-Fuc .) could not be localized by FITC-conjugated UEA-I (Ulex europeus agglutinin-l). Surface mucous cells (SMC) and foveolar mucous cells (FMC) were devoid of ƒ¿-D-glucose (ƒ¿-D-Glc .) and ƒ¿-D-mannose (a-D-Man.), although glandular mucous cells (GMC) were rich in these sugars. Sialic acid with mono or di-0-acetyl substitution at carbons 7, 8, 9 of their polyhydroxyl side chain was the predominant form of the neuraminic acid.

This study was carried out on the lips of twenty buffalo heads of both sexes collected from Kafrelsheikh abattoir to illustrate the morphological features of the lips by using light microscope and scanning electron microscope. The lips and the oral commissure are covered externally with thin skin and lined internally with mucous membrane. The nasolabial plate is covered with stratified squamous keratinized epithelium. The core of the lips is formed of bundles of skeletal muscles separated with connective tissue fibers.The core of the commissure is formed of bundles of skeletal muscles, collagen fibers, adipose tissue and PAS and Ab positive seromucoid glands. The core of the nasolabial plate is formed mainly of connective tissue followed by lobules of serous glands with few bundles of skeletal muscles. Tow types of hair follicles were found in the dermis of the covering skin; the ordinary and covernous types. Conical papillae are found in the internal aspect of the oral commissure, while the free border of the lips carried blunt and short papillae.