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  DOI Prefix   10.20431


 

International Journal of Research Studies in Zoology
Volume 1, Issue 3, 2015, Page No: 16-26

Functional-Morphological Study of the Oropharyngeal Cavity and the Tongue of the Common Kestrel, (Falco Tinnunuculus)

Nahed A. Shawki1, Ahmed M. Abdeen2, Fatma A. Mahmoud1

1.Department of Zoology, Faculty of Science, Assiut University.
2.Department of Zoology, Faculty of Science, AlmansoraUniversity.

Citation : Nahed A. Shawki, Ahmed M. Abdeen, Fatma A. Mahmoud, Functional-Morphological Study of the Oropharyngeal Cavity and the Tongue of the Common Kestrel, (Falco Tinnunuculus) International Journal of Research Studies in Zoology 2015, 1(3) : 16-26

Abstract

The aim of the present study was to investigate the light and electron microscopic structure of the roof of the oropharyngeal cavity of the common kestrel. The roof of the oropharyngeal cavity of the common kestrel, Falco tinnunuculus is distinguished into two regions; the palate region and the pharyngeal region. The palate region is relatively twice the length of the upper jaw that incubates longitudinal choana and has one medial and two lateral ridges that bears several longitudinal rows of posteriorly-directed and pointed papillae while posteriorly, the palate flaps to form a pair of distinctive palatine wings. While, the pharyngeal region is short, relatively half the length of the palate region and incubates a narrow infundibular fissure, as well as, numerous of the orifices of the pharyngeal salivary gland and also bears several rows of posteriorly-directed papillae which are arranged transversely on its posterior margin "posterior pharyngeal papillae" forming the pharyngeal wing. The palate region of the roof of the oropharyngeal cavity is covered with highly desquamate keratinized stratified epithelium that carrying microridges on its surface. The keratinized epithelium forming the papillae that are scattered on the surface of the palate region, as well as, on the posterior margin "palatine papillae". The epithelium of the palate region is characterized by the disappearance of the dermal papillae. The pharyngeal region is covered by non- keratinized stratified squamous epithelium while the pharyngeal papillae are covered by keratinized epithelium. The epithelium of the pharyngeal region is characterized by the appearance of short and few dermal papillae. The epithelium of the roof of the oropharyngeal cavity becomes transitional- type at the region of the connection with the upper and lower jaw.


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