Histological and anatomical study of trachea of native partridges (Chukar chukar)

Document Type : Full Research Paper

Author

Department of Anatomical Sciences, Faculty of Veterinary Medicine, Islamic Azad University, Shahrekord Branch, Shahrekord, Iran.

Abstract

This study was carried out in 8 female and 8 male twenty-week-old healthy native partridges. The birds were deeply anesthetized by ether inhalation and euthanized. After dissection, the position of trachea and related structures were studied then divided into cranial, middle and caudal portions. The following characteristics were studied by using stereomicroscope: the gross shape and numbers of tracheal rings, insertion of sternotrachealis muscles on trachea, complete or incomplete of rings, their shape in cross section and arrangement of the rings, annular ligaments and tracheal collapsibility. The specimens were taken from three portions and fixed in 10% neutral buffered formalin. Tissue sections stained with H&E and special stainings: Alcian blue, PAS, Foot’s, Verhoeff’s, and Masson’s trichrome. The tracheal rings in native partridges were complete and their shape varied and changed from elliptic cranially to circular manner caudally. They bounded by annular ligaments and are resistant against pressure. The numbers of rings were 102-114 and sternotrachealis muscles inserted between the 90-102th rings. The histology of trachea showed no significant differences according to sex and among various portions. The trachea was composed of tunica mucosa-submucosa, cartilagino-muscular and serosa. The epithelium was ciliated pseudostratified columnar contained simple alveolar mucous glands which reacted positively to alcian blue but negatively to PAS. The muscularis mucosa was absent. The loose propria-submucosa contained of all the connective fibers. Tunica cartilagino-muscular was composed of complete hyaline cartilaginous rings and striated muscles. Serosa was composed of loose tissue contained vessels, parasympathetic ganglia, adipose tissues and all the connective fibers.

Keywords


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