The present study aimed to describe the structural and ultrastructural morphological characteristics of the lingual epithelium and the connective tissue cores (CTCs) of wild boar (Sus scrofa). The tongues were processed for light microscopy, scanning electron microscopy, and transmission electron microscopy. In this study, we revealed the filiform, fungiform, foliate, and vallate papillae. The filiform papilla is elongated with a conical shape and its CTC has a conical shape; the fungiform papilla is rounded with a dome-shape and its CTC is flower bud; the foliate papilla is formed by four pairs of epithelial folds and irregular grooves, and its CTC is thin with adjacent conjunctive projections, and taste buds and serous glands in the epithelial layer have been evidenced; and the vallate papilla is oval surrounded by a groove with increases of epithelium surface, and the CTC is formed by numerous connective projections lined. Also noted were serous gland and taste buds on the medial wall of the vallate papilla. The epithelium has the keratinized, granular, spinous, basal, and lamina propria layers. In conclusion, we found new descriptions and shapes of the CTCs of the lingual papillae. In addition, we demonstrated the epithelium structural characteristics, the nuclear distribution between the epithelial layers, and the ultrastructural aspects of the dorsal epithelium of the tongue.

中文翻译：

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野猪舌头的形态和超微结构特征。

本研究旨在描述野猪（Sus scrofa）舌上皮和结缔组织核心（CTC）的结构和超微结构形态特征。将舌头进行光学显微镜检查，扫描电子显微镜检查和透射电子显微镜检查。在这项研究中，我们揭示了丝状，真菌状，叶状和叶状乳头状。丝状乳头呈圆锥形伸长，其CTC为圆锥形。真菌状的乳头圆形，呈圆顶状，CTC为花蕾。叶状乳头由四对上皮皱褶和不规则的凹槽形成，其CTC较薄，具有相邻的结膜突起，并且在上皮层中已发现味蕾和浆液腺。轮状的乳头为椭圆形，周围有上皮表面增加的凹槽，CTC由许多内衬的结缔突起形成。还注意到在滑石乳头内侧壁上有浆液腺和味蕾。上皮具有角质化，颗粒状，棘状，基底层和固有层。总之，我们发现了舌乳头CTC的新描述和形状。此外，我们证明了上皮的结构特征，上皮层之间的核分布以及舌背背上皮的超微结构方面。和固有层。总之，我们发现了舌乳头CTC的新描述和形状。此外，我们证明了上皮的结构特征，上皮层之间的核分布以及舌背背上皮的超微结构方面。和固有层。总之，我们发现了舌乳头CTC的新描述和形状。此外，我们证明了上皮的结构特征，上皮层之间的核分布以及舌背背上皮的超微结构方面。