Gross Anatomical Studies on the Trachea and Bronchi of Gaddi Sheep
Keywords:Gross anatomy, Trachea, Gaddi sheep
Trachea was a flexible, cartilaginous and membranous tube. The incomplete tracheal rings were dorsally connected by
trachealis muscle on the luminal side. Trachea gave off right apical bronchus at level of 3rd rib before bifurcation into right andÂ left principle bronchi at the level of fifth rib, which ventilated the right and left lung respectively. The trachea of Gaddi sheep wasÂ composed of forty five to forty eight cartilaginous rings from larynx to its bifurcation into right and left principal bronchi. TheÂ right apical bronchus originated at 37th - 38th ring. Total length of the trachea was 25.23 Â± 4.02 cm in Gaddi sheep. The meanÂ outer vertical diameter (OVD) and mean outer transverse diameter (OTD) of the trachea was 27.92 Â± 1.95 and 20.74 Â± 0.53 mmÂ respectively. The mean inner vertical diameter (IVD) and mean inner transverse diameter (ITD) in Gaddi sheep was 22.79 Â± 1.93Â mm and 15.53 Â± 0.44 mm respectively. The average thickness of tracheal cartilage was 2.56 Â± 0.13 mm. Gaddi sheep followedÂ monopodial pattern of bronchial division, where every secondary bronchus arose from each longitudinal principal bronchus.