The keratinized epithelium of the house-mouse (Mus musculus) tongue: Its structure and histochemistry

Fine Structure of the Dorsal Epithelium of the Tongue of the Japanese Terrapin, Clemmys japonica (Cheloia, Emydinae).

“…Earlier reports (OSAWA, 1898;IWASAKI and MIYATA, 1985a; RABINOWITZ and TANDLER, 1986;SCHWENK, 1986; IWASAKI, 1990b) and the present study have demonstrated that the dorsal lingual surface of the reptile is rich in papillae, as is the case in mammals (FARBMAN, 1966(FARBMAN, , 1970CANE and SPEARMAN, 1969; HUME and POTTEN, 1976;STEFLIK et al, 1983; IWASA-KI and MIYATA, 1985b;IWASAKI et al, 1987a IWASAKI et al, , b, 1988 BOSHELL et al, 1989). The lingual papillae in the reptiles is resembles in distribution the filiform papillae in amphibians and mammals.…”

“…The filiform papillae, by contrast, have no direct relationship to gustation, showing more or less intense keratinization (FARBMAN, 1966(FARBMAN, , 1970 CASE and SPEARMAN, 1969;BOSHELL et al, 1982;STEFLIK et al, 1983;IWASAKI andMIYATA, 1989, 1990;IWASAKI, 1990a). It seem that in mammals, the filiform papillae are suited for the retention of food and mucous fluid on the surface of the tongue.Earlier reports (OSAWA, 1898;IWASAKI and MIYATA, 1985a; RABINOWITZ and TANDLER, 1986;SCHWENK, 1986; IWASAKI, 1990b) and the present study have demonstrated that the dorsal lingual surface of the reptile is rich in papillae, as is the case in mammals (FARBMAN, 1966(FARBMAN, , 1970CANE and SPEARMAN, 1969; HUME and POTTEN, 1976;STEFLIK et al, 1983; IWASA-KI and MIYATA, 1985b;IWASAKI et al, 1987a IWASAKI et al, , b, 1988 BOSHELL et al, 1989). The lingual papillae in the reptiles is resembles in distribution the filiform papillae in amphibians and mammals.…”

“…The relatively strong keratinization, especially of the dorsal epithelium, is associated with the performance of these functions. The keratinized epithelium forms compactly distributed fine processes or filiform papillae (FARBMAN, 1966(FARBMAN, , 1970CANE and SPEARMAN, 1969;HUME and POTTEN, 1976;BOSHELL et al, 1982;STEFLIK et al, 1983;MACKENZIE and BICKENBACH, 1984;IWASAKI andMIYATA, 1989, 1990;IWASAKI,1990a). In mammals, the tongue plays only a small part in the secretion of salivary fluid, as the major salivary glands develop to assume this purpose.…”

Electron Microscopic Characterization of Filiform Papillae in the Normal Human Tongue.

“…The fine structure of lingual epithelia has been studied in various species of animals (KATO and KUSHIDA, 1965;KUBOTA et al, 1966;FARBMAN, 1970;CANE and SPEARMAN, 1969;GREENBAUM and PHILLIPS, 1974;HUMS and POTTEN, 1976;FERNANDEZ et al, 1978;SINGH et al, 1980;BOSHELL et al, 1980aBOSHELL et al, , b, 1982HOFER,1981;KRAUSE and CUTTS, 1982;STERFLICK et al, 1983;MACKENZIE and BICKENBACH, 1984;MACK-ENZIE and DABELSTEEN, 1987;OHMURA, 1988;KONDO et al, 1988;IWASAKI andMIYATA, 1989, 1990;IWASA-KI, 1990, IWASAKI et al, 1992. These studies demonstrated that lingual epithelia vary to a considerable extent in morphology among different species, showing unique external configurations represented by the presence of various types of papillae.…”

“…It has been reported using light microscopy that granular cells of filiform papillae in rats (FARIBMAN, 1970), mice (CANE and SPEARMAN, 1969) and humans (BOSHELL et al, 1980a) contain both pale-eosinophilic and basophilic types of keratohyaline-like granules. Ultrastructurally, basophilic granules are highly electron-dense, while eosinophilic granules are less electron dense (BOSHELL et al, 1980b).…”