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Anatomical, Histological, and Electron Microscopic Structures of Syrinx in Male Budgerigars (Melopsittacus undulatus)

Part of: Micrographia Collection

Published online by Cambridge University Press:  04 November 2020

Fatma M. Abdel-Maksoud Open the ORCID record for Fatma M. Abdel-Maksoud [Opens in a new window] ,
Marwa M. Hussein Open the ORCID record for Marwa M. Hussein [Opens in a new window] ,
Amira Hamdy  and
Ismail Abdel-Aziz Ibrahim
Fatma M. Abdel-Maksoud*
Affiliation:
Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt
Marwa M. Hussein
Affiliation:
Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt
Amira Hamdy
Affiliation:
Department of Anatomy, Faculty of Veterinary Medicine, New Valley University, New Valley, Egypt
Ismail Abdel-Aziz Ibrahim
Affiliation:
Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt
*
*Author for correspondence: Fatma M. Abdel-Maksoud, E-mail: fatma.abdelmaksoud@vet.au.edu.eg
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Abstract

The syrinx is the main source for phonation in birds, its function is analogous to the mammalian larynx. Birds have both a larynx and a syrinx, but they use only the latter to vocalize. The objective of this work to give a detailed description of the anatomical, histological, and ultrastructural of syrinx in male budgerigars as a model of a passerine bird. The syrinx in the current study was to be found as a tracheobronchial type, it consists of cranial (tympanum) part and caudal (bronchosyringeal) part and, additionally, there are lateral vibrating membranes. The tympanum is formed of the last six tracheal rings, histologically its lamina epithelialis is a pseudostratified ciliated columnar epithelium with goblet cells and interrupted by intraepithelial glands. The secretory acini appear oval and lined by pyramidal secretory cells. The lamina propria–submucosa contain numerous blood capillaries, immune cells, and telocytes (TCs). The electron microscopic examination revealed numerous blood capillaries surrounded by fibroblasts and numerous immune cells, including mast cells and wandering leukocytes, within the tympanum mucosa. Hence, this study provides a detailed knowledge about the syrinx in male budgerigars.

Keywords

budgerigarshistologicalsyrinxtympanum
Type
Micrographia
Information
Microscopy and Microanalysis , Volume 26 , Issue 6 , December 2020 , pp. 1226 - 1235
Copyright
Copyright © Microscopy Society of America 2020

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Footnotes

†

Deceased

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