Histomorphological And Certain Histochemical Studies on The larynx And Lungs of Black Bengal Goat ( Carpa Hircus )
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Date
1998
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Birsa Agricultural University, Ranchi
Abstract
Histomorphological and certain histochemical studies were con ducted on the larynx, trachea and lungs of ten adult healthy Black Bengal goats.
Histomorphology
Larynx: The larynx consisted of mucosa, submucosa, layer of muscles and cartilages and adventitia. The mucosa was composed of non keratinized stratified squamous epithelium upto vocal folds and of pseudostratified columnar ciliated epithelium in the remainder areas. Lamina propria and submucosa were intermingled, containing abundant glands in large groups. The glands were of tubuloalveolar, mucous, seromucous types. Cricoid, thyroid and arytenoid cartilages were hyaline in nature and epiglottis and corniculate cartilages were of elastic type. Laryngeal muscles were of skeletal type and adventitia was composed of loose connective tissue.
Trachea: The tracheal wall consisted of mucosa, submucosa, musculo-cartilaginous-layer and adventitia. The tracheal epithelium was of pseudostratified columnar ciliated type with goblet cells. Average thickness of the epithelium was 55.93 ± 2.48 um. Lamina propria and submucosa were blended with each other, containing abundant collagen and clastic fibres, lymphocytes, lymph nodules and blood vessels. Tracheal glands were present in the propria-submucosa. The glands were of tubuloalveolar, mucous or mixed types.