Comparative Histology and Micrometric Analysis of Pharyngeal cavity in Egyptian Laughing Dove (Streptopelia senegalensis aegyptiaca) and Japanese Quail (Coturnix coturnix japonicum)

Posthatching developmental studies on the tongue and laryngeal entrance of the common quail (Coturnix coturnix, Linnaeus, 1758) in different five age‐stages

“…The pharyngeal papillae located on the caudal border of the laryngeal mound is the common structure in all studied developmental age‐stages, similar to that observed in most avian species (Abumandour, 2018; Abumandour & El‐Bakary, 2017a; Abumandour & El‐Bakary, 2017b; Al‐Ahmady Al‐Zahaby, 2016) while, it is completely absent in southern lapwing (Erdogan & Perez, 2015). The presence of the two pharyngeal row were observed in the current work in all developmental stages, that harmonious with previous published articles (Abumandour, 2018; Abumandour & El‐Bakary, 2017a), while, the only one pharyngeal row recorded in some birds (Abumandour & El‐Bakary, 2019a; Abumandour & Gewaily, 2019; Mahdy, 2020), but the three pharyngeal rows observed in the Japanese quail (Madkour, 2018). Functionally, these caudally oriented pharyngeal papillae likely share in orienting the food particles toward the esophagus (Abumandour & El‐Bakary, 2017a; El‐Mansi et al, 2020; Jackowiak & Godynicki, 2005).…”

Morphological and ultrastructural features of the laryngeal mound of Egyptian Cattle Egret (Bubulcus ibis, Linnaeus, 1758)

“…Our histological observations showed that the lining epithelium of the laryngeal mound was non-cornified stratified squamous epithelium till the laryngeal inlet. This result agrees with the reports of many published data in other different birds such as Egyptian geese [ 29 ], laughing dove and Japanese quail [ 22 ], duck [ 28 ], and turkey [ 3 , 34 ]. The latter author only showed the stratified squamous epithelium is keratinized, which is different according to the feeding habits of the birds.…”

“…The current study revealed that the cricoarytenoid salivary glands were numerous distributed in one row along lamina propria closely to the lamina epithelialis. In this point, Madkour [ 22 ] reported that the cricoarytenoid salivary glands are arranged in three groups in Japanese quail and two groups in laughing dove, while Mohamed et al [ 29 ] in Egyptian geese and Mohamed [ 28 ] in duck showed that the laryngeal mound has four groups of these glands. On other hand, in emu, the glands concentrated on the dorsolateral aspect of the arytenoid cartilages, and the rest of the laryngeal mound are free of glands [ 10 ].…”

“…The present study revealed that the laryngeal cartilages of the laryngeal mound were a hyaline type, the chondrocytes were located inside the lacunae and surrounded by matrix. In this connection, the body of the arytenoid and procricoid cartilages are ossified and become trabeculae in Japanese quail [ 22 ]. Moreover, the cricoid cartilage is fully ossified in turkey [ 3 ].…”