Authors
1 Department of Basic Sciences, Faculty of Veterinary Medicine, Shahrekord University, Shahrekord, Iran
2 Graduate Student of Veterinary Medicine, Shahrekord University, Shahrekord, Iran
3 DVSc Graduated of Avian Diseases, Young Researchers and Elite Club, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran
Abstract
The aim of this study was to investigate the dorsal surface of the long-eared hedgehog tongue using scanning electron microscopy. The tongue of the long-eared hedgehog is rectangular-shaped with an elongated body and a widened root and a marked deep median groove can be seen on its dorsal surface. A characteristic feature of the lingual root is presence of two huge laterally situated folds. These anatomical structures have never been described with regard to other small mammals studied so far. According to their anatomical appearances, the lingual papillae can be distinguished as filiform, conical, fungiform, circumvallate and foliate papillae. The filiform papillae covering the body of the tongue are longer and wider than those on its apex and have an apparent fork-like appearance. Fungiform papillae are evenly distributed on the dorsal surface of the apex and body of the tongue. The triangular area of the lingual root contains small caudally directed conical papillae with single processes. Foliate papillae are situated on both lateral surfaces of the lingual root medial to the huge lateral lingual folds as three large obliquely situated parallel folds. There are three circumvallate papillae, two of which are obliquely situated on both sides of the rostral part of the lingual root, while the third one is situated in the midline of the caudal part of the lingual root. The results show that the tongue structure of the long-eared hedgehog is more complex in comparison with other mammals which is related to its phylogeny and feeding habits.
Keywords
Main Subjects
- Iwasaki S. Evolution of the structure and function of the vertebrate tongue. J Anat 2002; 201(1): 1-13.
- Emura S, Okumura T, Chen H. Scanning electron microscopic study of the tongue in the peregrine falcon and common kestrel. Okajimas Folia Anat Jpn 2008; 85(1): 11-15.
- Emura S, Okumura T, Chen H. Scanning electron microscopic study of the tongue in the Japanese pygmy woodpecker (Dendrocopos kizuki). Okajimas Folia Anat Jpn 2009; 86(1): 31-35.
- Sonntag CF. The comparative anatomy of the tongues of the mammalia. X. Rodentia. Proc Zool Soc London 1924; 95(2): 725-748.
- Fawcett DW. Textbook of histology. Philadelphia, USA: WB Saunders 1986:112-117.
- Jabbar AI. Anatomical and histological study of tongue in the hedgehog (Hemiechinus auritus). Int J Recent Sci Res 2014; 5(4): 760-763.
- Taha AM. Comparative anatomical, histological and histochemical study of tongue in two species of insectivorous vertebrates. Aust J Basic Appl Sci 2013; 7(1): 401-410.
- Grandi D, Arcari ML, Azalli G. Ultrastructural aspects of the lingual papillae in the gerbil (Meriones unguiculatus). Ital J Anat Embryol 1994; 99: 201-217.
- Iwasaki S, Yoshizawa H, Kawahara I. Study by scanning electron microscopy of the morphogenesis of three types of lingual papilla in the mouse. Anat Rec 1996; 157(1): 41-52.
- Iwasaki S, Yoshizawa H, Kawahara I. Study by scanning electron microscopy of the morphogenesis of three types of lingual papilla in the rat. Anat Rec 1997; 247(4): 528-541.
- Kobayashi K. Three-dimensional architecture of the connective tissue core of the lingual papillae in the guinea pig. Anat Embryol 1990; 182: 205-213.
- Abumandour MMA, El-Bakary RMA. Morphological and scanning electron microscopic studies of the tongue of the Egyptian fruit bat (Rousettus aegyptiacus) and their lingual adaptation for its feeding habits. Vet Res Commun 2013; 37(3): 229-238.
- Thome H. Oral cavity and pharynx. In: Nickel R, Schummer A, Seiferle E (Eds). Textbook of the anatomy of pets. Berlin, Germany: Parey Buchverlag 1971; 121-153.
- Abumandour MMA, EL-Bakary RMA. Anatomical reference for morphological and scanning electron microscopic studies of the New Zealand white rabbits tongue (Orycotolagus cuniculus) and their lingual adaptation for feeding habits. J Morphol Sci 2013; 30(4): 254-365.
- Iino T, Kobayashi K. Morphological studies on the lingual papillae and their connective tissue papillae of rats. Shigaku 1988; 75(6): 1039-1060.
- Jackowiak H, Godynicki S. The distribution and structure of the lingual papillae on the tongue of the bank vole Clethrinomys glareolus. Folia Morphol (Warsz) 2005; 64(4): 326-333.
- Wolczuk K. Dorsal surface of the tongue of the hazel dormouse (Muscardinus Avellanarius): Scanning electron and light microscopic study. Zoolog Pol 2014; 59(1-4): 35-47.
- Emura S, Tamada A, Hayakawa D, et al. SEM study on the dorsal lingual surface of the flying squirrel, Petaurista leucogenys. Ann Anat 1999; 181(5): 495-498.
- Dinc G, Girgin A, Yilmaz S. Prenatal and postnatal development of papilla fungiformis in rats [Turkish]. F Ü Saðlik Bil Derg 1995; 9: 161-163.
- Emura S, Tamada A, Hayakawa D, et al. SEM study on the dorsal lingual surface of the nutria, Myocastor coypus. Kaibokagu Zasshi 2001; 76(2): 233-238.
- Kobayashi K, Miyata K, Takahashi K, et al. Three-dimensional architecture of the connective tissue papillae of the mouse tongue as viewed by scanning electron microscopy. Kaibogaku Zasshi 1989; 64(6): 523-538.
- Emura S, Okumura T, Chen H, et al. Morphology of the lingual papillae in the raccoon dog and fox. Okajimas Folia Anat Jpn 2006; 83(3): 73-76.
- Emura S, Okumura T, Chen H. Morphology of the lingual papillae in the Japanese marten. Okajimas Folia Anat Jpn 2004; 84(2): 77-82.
- Pastor J, Moro J, Verona J, et al. Morphological study by scanning electron microscopy of the lingual papillae in the common European bat (Pipistrellus pipistrellus). Arch Oral Biol 1993; 38(7): 597-599.
- Shindo J, Yoshimura K, Kobayashi K. Comparative morphological study on the stereo-structure of the lingual papillae and their connective tissue cores of the American beaver (Castor canadensis). Okayima Folia Anat Jpn 2006; 82(4): 127-138.
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