Title of article :
Histological and histochemical investigations of the pharyngeal jaw apparatus of a carp Cirrhinus mrigala
Author/Authors :
Kumari، نويسنده , , Usha and Mittal، نويسنده , , Swati and Mittal، نويسنده , , Ajay Kumar، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2014
Pages :
14
From page :
421
To page :
434
Abstract :
The histological organization and histochemical aspects of the pharyngeal jaw apparatus of the Indian major carp Cirrhinus mrigala are described. The pharyngeal jaw apparatus consists of a lower pharyngeal jaw and a chewing pad. Histochemical analysis reveals that the epithelium covering the lower pharyngeal jaw is mucogenic and is involved in the secretion of different classes of glycoproteins (GPs) including GPs with oxidizable vicinal diols, GPs with O-sulphate esters and GPs with sialic acid residues with and without O-acyl substitution. Characteristically, the epithelium at irregular intervals is differentiated into simple or branched tubular pharyngeal glands, which often extend deep into the sub-epithelial tissues. Copious mucus secretion from pharyngeal glands may be associated with transportation of chewed food particles toward the esophagus. Histochemistry and fluorescence microscopy show that the epithelium covering the chewing pad is keratinized. The keratinized surface of the chewing pad may be considered to serve as an occlusion surface for the lower pharyngeal jaw teeth forming an efficient pharyngeal mill for chewing food materials.
Keywords :
Carp , Pharyngeal mill , C. mrigala , Histochemistry , histology
Journal title :
Acta Histochemica
Serial Year :
2014
Journal title :
Acta Histochemica
Record number :
1760308
Link To Document :
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