Morphological characterization of the laryngeal mound of the Egyptian geese

الملخص EN

The current study was carried on thirteen adult healthy Egyptian geese (Alopochen aegyptiacus) of both sexes.

The samples were processed for the morphological features of the laryngeal mound.

The laryngeal mound was an oval elevation carried dorsally the glottis that continued caudally with short narrow laryngeal sulcus.

The glottis measured 12.91±0.16mm long and 2.88±0.22mm wide, its rim was guarded by 8-9 small caudally directed pointed papillae.

The laryngeal mound was lined by respiratory epithelium; pseudostratified ciliated columnar type with goblet cells and intraepithelial glands.

There were two types of intraepithelial glands; serous and mucous types.

The mucous type lined by GAG producing cells, while the serous one lined by four different types of cells; GAG producing cells, secretory cells contained either large faintly stained granules or small dark blue stained granules and progenitor cells.

Four groups of cricoarytenoid salivary glands could be identified within the submucosa on each side of laryngeal mound, in which two groups on each side of the laryngeal inlet and two groups in each side of the laryngeal sulcus.