Ultramorphological studies on the lingual papillae of Rabbit (Oryctolagus cuniculus) in relation to its feeding habits | ||||
| Delta Journal of Science | ||||
| Article 2, Volume 36, Issue 2, June 2013, Page 6-12 PDF (886.72 K) | ||||
| Document Type: Research and Reference | ||||
| DOI: 10.21608/djs.2013.139579 | ||||
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| Author | ||||
| Gamal Ali Mohammed | ||||
| Departments of Zoology, Faculty of Science, Zagazig University, Egypt | ||||
| Abstract | ||||
| The distribution and structure of the lingual papillae on rabbit tongue were studied in relation to its feeding habits by means of light and scanning electron microscopy. The tongue of rabbit is of about 5 cm in length and 9 mm in width. The dorsal surface of the tongue is differentiated into four regions according to the nature of papillae; apex, body, lingual torus (intermolar prominence) and root. On the surface of the apex and body of the tongue there are four main types of papillae: filiform, fungiform, vallate and foliate papillae. The filiform one can be differentiated morphologically into five sub types of variable size and shape according to their location. Fungiform papillae are numerous on the anterior part of the tongue. They are elliptical or circular in shape and embedded in between filiform ones. In this region both filiform and fungiform are devoid of taste buds indicating their mechanoreceptive function. Two oval vallate papillae with numerous taste buds are situated on the side wall of the tongue root, elucidating their chemoreceptive role. A Pair of patches having well developed foliate papillae is observed in the latero-posterior part of the tongue. Each is oval in shape and has several parallel papillae lacking taste buds and may separate by shallow grooves. Histological observation indicates keratinization of the dorsal surface of the tongue with variable degrees. | ||||
| Keywords | ||||
| Rabbit; Tongue; Papillae; Light and Scanning Microscope | ||||
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