title: Histochemical study on the tongue of Rana ridibunda (anuran amphibian).
abstract: A structural and histochemical study of the tongue in the Anuran Amphibian Rana ridibunda was carried out. Histochemical analysis of the filiform and fungiform papillae of the dorsal epithelium has shown a variety of cellular types which may be characterized cytochemically. All of them, except the goblet cells, show a remarkable amount of neutral mucins. The intensity of histochemical positive reaction for sulphomucins, sialomucins and protein is variable according to the cell type. Other histochemical reactions show that the lingual glands are rich in neutral mucins, but not in sialomucins. Histochemically in the component the basic proteins with sulphydryl groups are demonstrated. This sulphydryl groups are more abundant in the glands located in the deep regions.
mesh_terms: D000818:Animals; D006025:Glycosaminoglycans / Q000032:analysis; D009077:Mucins / Q000032:analysis; D010503:Periodic Acid-Schiff Reaction; D011895:Rana ridibunda / Q000378:metabolism*; D011898:Ranidae / Q000378:metabolism*; D013194:Staining and Labeling / Q000379:methods; D014059:Tongue / Q000166:cytology / Q000378:metabolism*
chemical_list: D006025:Glycosaminoglycans; D009077:Mucins