کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1923547 1048900 2014 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Histological and histochemical investigations of the pharyngeal jaw apparatus of a carp Cirrhinus mrigala
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
Histological and histochemical investigations of the pharyngeal jaw apparatus of a carp Cirrhinus mrigala
چکیده انگلیسی

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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Histochemica - Volume 116, Issue 3, April 2014, Pages 421–434
نویسندگان
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