Morphological and scanning electron microscopic studies of the lingual papillae of the tongue of the goat (Capra hircus)

Abstract

The morphology of different lingual papillae of the Egyptian goats was studied by gross observation, scanning electron microscopy, and light microscopy. According to function, two types of papillae were present; mechanical (filiform, conical and lenticular papillae) and gustatory papillae (fungiform and vallate papillae). Two types of filiform papillae were detected with different shape and position. Moreover, two types of conical and lenticular papillae could be recognized on the lingual torus. Abundant fungiform papillae were found on the dorsal and ventral surfaces of the tip of the tongue. The vallate papillae had also different shapes. Taste buds were demonstrated within the epithelium of the dorsal surfaces of the fungiform papillae and the lateral surfaces of the vallate papillae. In addition, a longitudinal row of large papillae was located on the lateral aspect of the tongue in relation to the filiform papillae. These papillae were suggested to be called elongated conical papillae and may be considered as ones of the lingual papillae. In conclusion, the current study provides a detailed description of the different lingual papillae of the Egyptian goat's tongue. Presence of different types and shapes of mechanical and gustatory lingual papillae in goats' tongue suggests a high degree of functional adaptation to their diet.

Scanning electron microscopy of the palatine mucosa with connective tissue papillae of the Egyptian red fox (Vulpes vulpes aegyptiaca, Linnaeus, 1758)

“…On the other hand, cell surface outlines of the epithelial surface of the interrugal areas were not visible. These results are consistent with the previous literature showing that the microplicae patterns, as well as their densities differ in different parts of the oral cavity (Asikainen et al, 2015; Mahdy et al, 2018; Mahdy, Mohamed, & Abdalla, 2020a; Mahdy, Mohamed, & Abdalla, 2020b; Mahdy & Mohammed, 2021). It is suggested that microplicae provide mechanical support against trauma, reduce the frictional resistance between opposite surfaces, hold mucous layer forming a surface coat, help the passage of the metabolic products through the outer cell membrane, and prevent bacteria from entering the epithelium (Andrews, 1976; Asikainen et al, 2012; Asikainen et al, 2015).…”

Ultrastructural features on the oral cavity floor (tongue, sublingual caruncle) of the Egyptian water buffalo (Bubalus bubalis): gross, histology and scanning electron microscope

“…Furthermore, the current work agree with the previous work on other ruminants species that, there were numerous circumvallate papillae such as in; Egyptian water buffalo (12), cattle (49), and reeves' muntjac deer Muntiacus reevesi (28), goat (10,50), lambs (23), and deer (35,51).…”

Three‐dimensional study of the lingual papillae and their connective tissue cores in the Nile fox (Vulpes vulpes aegyptica) (Linnaeus, 1758)

“…Specimens, either intact or macerated, were post‐fixed in 2% osmium tetroxide (Merck, Darmstadt, Germany) and dehydrated in ascending grades of alcohol (Sigma‐Aldrich, Hamburg, Germany). The samples were then dried using liquid carbon dioxide, coated with gold–palladium using SPI‐Module Sputter Coater (Eden Instruments, France), and examined under a SEM (JSM‐5500 LV, Joel, Tokyo, Japan), operated at 20 KV (Mahdy, Abdalla, & Mohamed, 2021). Specimens preparation and examination were done at the central laboratory of South Valley University, Egypt.…”