HISTOLOGICAL STUDIES ON THE ORGANS OF UPPER RESPIRATORY TRACT FROM NOSTRIL TO LARYNX IN BLACK BENGAL GOAT (Capra hircus)

In the present study tissue samples were collected from external nares, nasal cavity, nasopharynx and larynx of six healthy adult Black Bengal goat. The samples were routinely prepared for histological observation. The external nares, and nasopharynx were lined by stratified squamous epithelium, and nasal cavity was ciliated pseudostratified columnar epithelium. Numerous hair follicles were identified at the outer border of the external nares. Nasal epithelium showed several cell types including ciliated cell, secreting cell, brush cell and basal cell. The nasal glands were serous and mucous type and solitary lymph nodes were identified in the propria. Epiglottis was made up of elastic cartilage where as others was made up of hyaline cartilage. Test buds were observed in all laryngeal cartilage except in the cricoid cartilage. The cricoid cartilage appeared in the form of continuous plate in contrast to small plates in others. No lymphonodular tissue was found at the base of epiglottis. Key word: Respiratory tract, Black Bengal goat, Histology ?