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Anatomy Research International
Volume 2013 (2013), Article ID 650601, 6 pages
http://dx.doi.org/10.1155/2013/650601
Research Article

Scanning Electron Microscopic Studies of the Pecten Oculi in the Quail (Coturnix coturnix japonica)

Laboratory of Anatomy, Histology & Embryology, Veterinary Faculty, University of Thessaly, 224 Trikalon street, 43100 Karditsa, Greece

Received 9 July 2013; Revised 2 September 2013; Accepted 2 September 2013

Academic Editor: Robert J. Spinner

Copyright © 2013 Aris F. Pourlis. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The main purpose of this study is to extend the microscopic investigations of the pecten oculi in the quail in order to add some information on the unresolved functional anatomy of this unique avian organ. The pecten oculi of the quail was studied by scanning electron microscopy. Eighteen- to-twenty two highly vascularised accordion-like folds were joined apically by a heavily pigmented bridge of tissue, which holds the pecten in a fanlike shape, widest at the base. The structure of the double layered limiting membrane was recorded. The presence of hyalocytes with macrophage-like appearance was illustrated. It is assumed that the pecten oculi of the quail resembles that of the chicken. Illustrated morphological features of this species may add information on the active physiological role of the pecten. But still, the functional significance of this organ is a matter of controversies.