Detection of morphometrical, histological and histochemical characteristics of lung and trachea in adult local squirrel (Sciurus anomalus)

The present study aimed to identify the topography, morphology, histochemistry and histology of lung structures, bronchial divisions trachea in adult local Squirrel (Sciurus anomalus) as a species inhabited Iraqi environments. This work was conducted on thirty both sexes (15) males females were divided into three equal groups, first for http://wsx5customurl.comanatomical perceptions, second resin cast technique third histological study. Anatomically, sexes, appeared cartilaginous structure consisting flexible rings, C-like, connected by annular ligaments. It begins at end cricoid cartilage from level cervical vertebra fourth thoracic vertebral plane; eventually, it splits right left main bronchi. Count tracheal entire weight lung, full length, diameter slightly less than but not significantly. tree detected cast, which constructed primary bronchi (Main bronchi), one split four secondary enter lobes two one. contains lobe, whereas observed right. Histologically, wall consists layers. Epithelial cells ciliated pseudostratified columnar goblet that reacted positively with PAS covered mucosa. Submucosa devoid glands. Trachealis muscle is outer aspect rings. Similarly trachea, are structured smaller diameter; they break up within primary, tertiary bronchi, then terminates respiratory bronchioles contain Clara open sacs alveoli. Two types pneumocystis lining current concluded anatomically histologically there no significant differences between squirrels. lobulation squirrels different other animals. resembled numerous animals, however, had micro morphometric changes. But, surface mucosa secrete neutral mucin, submucosal glands wall. Keywords: Trachea, Local Squirrel, Bronchial Tree, Histochemical, Lung.