Histology of larynx in the pigs

The present study was carried as a part of PhD programme in Department of Veterinary Anatomy, Veterinary college, Bengaluru, Karnataka. The histological studies was conducted on larynx of 10 adult healthy pigs. The larynx of the pig consisted of three unpaired and one paired cartilages namely epiglottis, thyroid, cricoid and paired arytenoids. The laryngeal cavity was divided into three different regions namely, anteriorly vestibule, middle glottis and caudal infraglottic cavity. The epithelial lining of the vestibule, glottis and initial portion of infraglottis was lined by stratified squamous non-keratinized epithelium. Rest of the infraglottis was lined by pseudostratified non-ciliated columnar epithelium. Laryngeal recesses was well developed in the glottis region. Mucus, serous and seromucous glands were seen in the propria submucosa. Subepithelial lymphatic aggregates and venous caverns were also noted.