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Light and Electron Microscopic Studies of the Trachea in the One‐Humped Camel (Camelus dromedarius)

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Histology of trachea of camel (Camelus dromedarius) was studied using light, scanning (SEM) and transmission electron microscopy (TEM). Tissue samples taken from the trachea (proximal, middle and distal part) were routinely prepared for histology (LM, EM) and stained with haematoxylin and eosin, Van Giesson (VG), Alcian blue, Periodic acid schiff (PAS), Masson's trichrome (MT), Verhof, PAS–VG and PAS–MT. The trachea of camel consists of 66–75 incomplete cartilaginous rings of hyaline. The lamina epithelium is composed of pseudostratified‐ciliated columnar epithelium with many goblet cells. Submucosal layers were loose connective tissue with many elastic fibres. The mucosal and submucosal layers were 517.2 ± 61.6 μm (n = 20) thick. Submucosal glands were tubuloalveolar with mucous (acidic and neutral) secretions. Trachealis muscle was attached to the inside sheet of tracheal cartilage. Ultrastructural studies showed that surface epithelium is pseudostratified with mucus‐producing goblet cells, ciliated and basal cells, similar to other mammals. The ciliated cells contained many mitochondria, oval nucleus and many big granules. In scanning electron microscopy (SEM) studies, viscoelastic layers were observed on the epithelial surface of trachea, and there were highly condensed cilia under this layer.
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Document Type: Research Article

Affiliations: Address of authors: Department of Basic Sciences, School of Veterinary Medicine, Ferdowsi University of Mashhad, PO Box 91775-1793, Mashhad, Iran; Corresponding author: Tel.:/, Fax: 0098 511 8427897

Publication date: 01 February 2007

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