Fine structure of the dorsal lingual epithelium of the juvenile hawksbill turtle,Eretmochelys imbricata bissa

Iwasaki, Shigeo; Asami, Tomoichiro; Wanichanon, Chaitip

doi:10.1002/(sici)1097-0185(199604)244:4<437::aid-ar2>3.0.co;2-s

Cited by 33 publications

(31 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is similar to the results reported in Eumeces schneideri [16], Gekko japonicas [17] and Anguis fragilis [29]. Keratinization of the dorsal lingual epithelium has been recognized in snake Elaph quadrivirgata [41], and in some turtles [20,[42][43][44]. This keratinization is considered as an adaptation to the dry land environment and used to protect the tongue epithelia during prey sniping, mastication and swallowing.…”

Section: Discussionsupporting

confidence: 87%

Ultrastructural Studies on the Tongue of Some Egyptian Lizards 1-Scincine Lizards Chalcides Oscellatus and Chalcides Sepsoides (Lacertilia, Scincidae)

Sarhan¹

2013

J Cytol Histol

View full text Add to dashboard Cite

Tongues of Egyptian lizards Chalcides ocellatus and Chalcides sepsoides are investigated under scanning and transmission electron microscope. Their tongues are divided into tip, anterior, middle and posterior regions.In C. ocellatus, the tip region is bifurcated and protected with strong, non-papillosed, keratinized epithelium. The lingual papillae are separating with wide trenches except in the middle region. Papillae of the anterior and posterior regions have serrated and imbricated ends oriented in the posterior direction. The surface epithelia is studded by tiny or reticular microvilli. Ultra-sections show that the imbricated portions have goblet cells rich in numerous secretory granules. The lamina propria of each papilla is provided with striated muscle fibers. The distribution and orientation of the lingual muscle fibers prove that the tongue is adapted for snipping, masticate and swallowing their praise.In C. sepsoides tongue, the tip region is slightly bifurcated. All lingual papillae have different shapes with narrow moats separating between them. Those of the anterior and posterior regions have free ends overlapped towards the anterior or posterior directions, respectively, while that of the middle region is not imbricated. The surface epithelia of the tongue has dispersed or aggregated microvilli.In the tongue of the C. sepsoides, new structures are described for the first time. At its ventral aspect, there is an accessory lingual muscle formed of numerous muscle fibers orient to the vertical, transverse or longitudinal directions. These orientations prove that the tongue is able to mash and suck the prey's sherbets. At the end of the posterior region, there is a ciliated concave depression hosting a laryngotracheal organ, which has T-shaped crevice precedent by large fleshy highly ciliated lip supported by inflexible folds.

show abstract

Section: Discussionsupporting

confidence: 87%

Ultrastructural Studies on the Tongue of Some Egyptian Lizards 1-Scincine Lizards Chalcides Oscellatus and Chalcides Sepsoides (Lacertilia, Scincidae)

Sarhan¹

2013

J Cytol Histol

View full text Add to dashboard Cite

show abstract

“…A tongue is found in all vertebrates except fishes and some amphibia, and the undulations of the dorsal lingual surface, the lingual papillae, are recognisable as a common feature of the tongues of most animals from amphibia to mammals (Iwasaki et al 1987a, b, 1997a, b, Iwasaki, 1990, with some exceptions, such as snakes (Iwasaki et al 1996 c). Keratinisation of the dorsal lingual epithelium has been recognised in higher vertebrates.…”

Section: mentioning

confidence: 99%

Ultrastructural study of the relationship between the morphogenesis of filiform papillae and the keratinisation of the lingual epithelium in the rat

1999

View full text Add to dashboard Cite

Tongues were removed from rat fetuses on d 16 of gestation (E16) and from newborn (P0) and juvenile rats on d 7 (P7) and d 21 (P21) postnatally for examination by light and transmission electron microscopy. In the fetuses at E16, no rudiments of filiform papillae were visible on the dorsal surface of the tongue. No evidence of keratinisation could be recognised over the entire dorsal lingual epithelium. At P0, rudiments of filiform papillae showed a similar distribution to that seen in the adult, but had a more rounded appearance. The columnar structure of cells in the epithelium, with the different degrees of keratinisation as observed in the mature adult, was indistinct, but a keratinised layer was clearly located at the tip of each filiform papilla. In juveniles at P7, the filiform papillae on the anterior part of the tongue were long and slender, and the anterior and posterior cell columns of the filiform papillae and the interpapillary cell columns were clearly distinguishable. In juveniles at P21, the structure of filiform papillae was identical to that in the adult. These results indicate that, in rats, the morphogenesis of filiform papillae advances in parallel with keratinisation of the lingual epithelium from just before birth to a few weeks after birth.

show abstract

“…The characteristics of the tongue mucosa using scanning electron microscopic (SEM) methods are described in the tongue surface of rat (Yoshioka & Muto, 1976; frog Rana cancrivora (Iwasaki & Wanichanon, 1993); rat snake (Iwasaki et al, 1996a(Iwasaki et al, , 1996b; turtle (Iwasaki et al, 1996b) and mouse (Watanabe, 1989). Moreover, the tongue mucosa epithelial cells have been studied in human and animals by transmission (TEM) and scanning electron microscopy by Gibbins (1962); Apleton & Tyldesley (1971); Arvidson (1976); Yoshioka & Muto;Iwasaki & Sakata (1985), Iwasaki & Miyata (1985); Watanabe (1989); Iwasaki & Wanichanon (1993) and Iwasaki et al (1996aIwasaki et al ( , 1996b.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the tongue mucosa epithelial cells have been studied in human and animals by transmission (TEM) and scanning electron microscopy by Gibbins (1962); Apleton & Tyldesley (1971); Arvidson (1976); Yoshioka & Muto;Iwasaki & Sakata (1985), Iwasaki & Miyata (1985); Watanabe (1989); Iwasaki & Wanichanon (1993) and Iwasaki et al (1996aIwasaki et al ( , 1996b.…”

Section: Introductionmentioning

confidence: 99%

Transmission Electron Microscopy Study of the Neonatal Rat Tongue Mucosa Treated with Special Attention to the Bacteriae on the Epithelial Cell Membrane

Picoli¹,

Lopes

Semprini

et al. 2006

Int. J. Morphol.

View full text Add to dashboard Cite

SUMMARY:The epithelial cell surfaces of neonatal Wistar rat tongue mucosa were examined by transmission electron microscopic method. The tissues were fixed by modified Karnovksy solution and embedded in Spurr resin. Thin sections of 90 nm thickness were cut and examined in the Jeol 1010 transmission electron microscopy. It was revealed that the queratinized squamous epithelial cells of the tongue mucosa exposed to cadmium presented groupings of numerous bacteriae which are attached to the flat cell membrane surfaces. The coccus and bacillus are attached to the cell membrane in organized rows or at random, as clearly seen in the TEM images. At high magnification, the transmission electron microscopic images showed that bacteriae are attached by a fibrillar structures from each other and from epithelial cell membrane and bacteriae. The control group analysis demonstrated that the cell membrane didn´t show the presence of bacteriae.

show abstract

Fine structure of the dorsal lingual epithelium of the juvenile hawksbill turtle,Eretmochelys imbricata bissa

Cited by 33 publications

References 18 publications

Ultrastructural Studies on the Tongue of Some Egyptian Lizards 1-Scincine Lizards Chalcides Oscellatus and Chalcides Sepsoides (Lacertilia, Scincidae)

Ultrastructural Studies on the Tongue of Some Egyptian Lizards 1-Scincine Lizards Chalcides Oscellatus and Chalcides Sepsoides (Lacertilia, Scincidae)

Ultrastructural study of the relationship between the morphogenesis of filiform papillae and the keratinisation of the lingual epithelium in the rat

Transmission Electron Microscopy Study of the Neonatal Rat Tongue Mucosa Treated with Special Attention to the Bacteriae on the Epithelial Cell Membrane

Contact Info

Product

Resources

About