Macroscopic and Microscopic Study of Larynx in the Male Ostrich

There is significant structural differences between the laiynx of birds and mamales. The larynx is located in the floor of the oropharyngeal cavity in the birds. The muscles and cartilages form the laryngeal mound. Six male adult ostrich were used to study the laiynx including its components the cricoid, arytenoids , glands. This study revealed that these components in ostrich have different feature from other birds. The laiynx protrudes from the floor of pharyngeal cavity. The skelton of laiynx in ostrich is composed of the unpaired cricoid cartilage and the paired arytenoids cartilages. A wide triangular slit as glottis is formed between the arytenoids cartilage.The joined arytenoids cartilages have irregular triangular shape from which three process originate. Epithelial tissue is nonkeratinized stratified squamous.Penetration of the connective tissue into epithelial tissue is observed in the area of the arytenoids cartilage. Lamina propria and submucosa is dense irregular connective tissue which contain many collagen fibers,fibroblast cell, blood vessels. Epithelial tissue on the surface of the laiynx contains intraepithelial unbranched tubulo -alveolar glands.The superficial part of lamina propria contains simple branched tubulo-alveolar which secret mucous. The process is devoid of the glands. Mucosal membrane of the surface of the laiynx is devoid of the glands on the posterior part of its.