Vol. 11, Special Issue 7 (2022)

Author(s):
Renu Yadav, Ishwar Singh, Meena Mrigesh, Amit Singh Vishen and Ashutosh Semwal

Abstract:
This study aim to explain the comparative histological, histochemical and histomorphometercal analysis of trachea in different age group after post hatching that is 0, 7, 28, 112 days and each group contained 6 birds. Histologically trachea had lamina epithelialise mucosa, lamina propria submucosa surrounded by cartilaginous ring, bundles of skeletal muscle and tunica adventitia surrounding muscle. The mucosa had ciliated pseudostratified columnar epithelium with intraepithelial mucous glands. The mean height of ciliated pseudostratified columnar epithelium increase significantly with age. The numbers of intraepithelial alveolar glands were increased with the advancement of age. The lamina propria submucosa had connective tissue containing collagen and reticular fibres with numerous blood vessels and few lymphocytes cells. Lamina propria submucosa was continuous with the perichondrium of the cartilaginous ring of trachea. There was no ossification in cartilaginous rings up to112days age. The width of cartilaginous ring in 0,7,28 and 112days were 46.79 ± 5.7, 69.85 ± 3.2, 107.95 ± 85 and 155.06 ± 14.66 µ, respectively. Tunica adventitia was made up of connective tissue with numerous blood vessels and some adipocytes surrounded the skeletal muscle. Cartilaginous ring and intraepithelial gland showed intense positive reaction for PAS and carmine. Intraepithelial gland also showed intense positive reaction for PAS-AB indicating presence of acidic as well as neutral mucins.