Himachal Journal of Agricultural Research

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Histological and Histochemical Studies on the Trachea of Gaddi Sheep


Affiliations
1 Department of Veterinary Anatomy, DGCN College of Veterinary and Animal Sciences, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, India
 

Histologically the wall of the trachea and principal bronchi were organized in four layers or tunics: mucosa, submucosa, muscle and tracheal cartilage, and adventitia. The trachea and principal bronchi of Gaddi sheep were lined by pseudostratified ciliated columnar epithelium containing ciliated cells, basal cells and mucous secreting goblet cells. The mean epithelial thickness of the mucosa was 51.62 ± 0.93 μm. The thickness of the epithelium gradually decreased as we moved posteriorly in trachea. The maximum mean epithelial thickness was recorded at the level of 5th tracheal ring (55.00 ± 1.22 fim) and minimum at 45th tracheal ring (49.56 ± 1.42 μm). The thickness of epithelium further decreased to 42.65 ± 1.62 μm in principal bronchus. Ciliated cells stained moderately for carbohydrates and acidic mucopolysaccharides whereas mildly for proteins. Goblet cells were distributed unevenly amongst these columnar cells. The granules of mucous goblet cells were PAS positive. Basal cells were small, round to ovoid with a centrally located round nucleus. Large numbers of tracheal glands were present in the submucosa, which could be located as deep as 2000fim. The trachea contained cartilages which were roughly 'C shaped pieces of hyaline cartilage that were incomplete dorsally.

Keywords

Gaddi Sheep, Trachea, Histology, Histochemistry.
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  • Histological and Histochemical Studies on the Trachea of Gaddi Sheep

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Authors

Virender Pathak
Department of Veterinary Anatomy, DGCN College of Veterinary and Animal Sciences, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, India
Rajesh Rajput
Department of Veterinary Anatomy, DGCN College of Veterinary and Animal Sciences, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, India

Abstract


Histologically the wall of the trachea and principal bronchi were organized in four layers or tunics: mucosa, submucosa, muscle and tracheal cartilage, and adventitia. The trachea and principal bronchi of Gaddi sheep were lined by pseudostratified ciliated columnar epithelium containing ciliated cells, basal cells and mucous secreting goblet cells. The mean epithelial thickness of the mucosa was 51.62 ± 0.93 μm. The thickness of the epithelium gradually decreased as we moved posteriorly in trachea. The maximum mean epithelial thickness was recorded at the level of 5th tracheal ring (55.00 ± 1.22 fim) and minimum at 45th tracheal ring (49.56 ± 1.42 μm). The thickness of epithelium further decreased to 42.65 ± 1.62 μm in principal bronchus. Ciliated cells stained moderately for carbohydrates and acidic mucopolysaccharides whereas mildly for proteins. Goblet cells were distributed unevenly amongst these columnar cells. The granules of mucous goblet cells were PAS positive. Basal cells were small, round to ovoid with a centrally located round nucleus. Large numbers of tracheal glands were present in the submucosa, which could be located as deep as 2000fim. The trachea contained cartilages which were roughly 'C shaped pieces of hyaline cartilage that were incomplete dorsally.

Keywords


Gaddi Sheep, Trachea, Histology, Histochemistry.

References