Abumandour Mohamed, Haddad Seham, Farrag Foad, Kandyel Ramadan, Roshdy Karam, Massoud Diaa, Khalil Eman Kamal
Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Alexandria University, Abees 10th, Alexandria, 21944, Egypt.
Department of Anatomy and Embryology, Faculty of Veterinary Medicine, University of Sadat City, Sadat City, 32897, Egypt.
BMC Zool. 2024 Aug 12;9(1):21. doi: 10.1186/s40850-024-00208-w.
Our research is the first to explore the ultrastructural features of the lingual papillary system of Arab Zebu cattle, highlighting their Chadian environmental adaptations.
There were two types of papillary systems: gustatory (fungiform and circumvallate) and mechanical (filiform, conical, and lentiform). The dorsal surface of the apex and rostral parts of the body had well-developed filiform papillae, whereas the tip's surface had mucosal folds, tubercles, and few filiform papillae. The torus lingua's dorsal surface displayed few lentiform papillae, while two conical papillae subtypes and numerous circumvallate papillae were present on its lateral surfaces. A slight median ridge on the dorsal surface of the body had not been described previously. Six filiform papillae subtypes were identified: long and rod-like on the tip; tongue-like and elongated on the lateral area of the apex and body; transient conical and leaf-like on the median line. The accessory processes were: one pair (on long, tongue-like, and transient conical), two pairs (on leaf-like and elongated), and four pairs on the large conical papillae. The two fungiform papillae subtypes were surrounded by a groove and had taste pores (3-5 on the oval and 5-9 on the round papillae). The U-shaped annular bad were observed around the ovoid circumvallate papillae, and the circular bad were observed around the round ones. The circumvallate had taste pores (8-14 on the round's dorsal and lateral surfaces and 6-10 on the ovoid's lateral surface).
The papillary system's regional divergence was specialized for its harsh and semi-harsh diet.
我们的研究首次探索了阿拉伯瘤牛舌乳头系统的超微结构特征，突出了它们对乍得环境的适应性。
存在两种乳头系统：味觉乳头（菌状乳头和轮廓乳头）和机械乳头（丝状乳头、圆锥状乳头和豆状乳头）。舌尖和舌体前部的背表面有发育良好的丝状乳头，而舌尖表面有黏膜皱襞、结节和少量丝状乳头。舌隆突的背表面有少量豆状乳头，而其侧面有两种圆锥状乳头亚型和许多轮廓乳头。舌体背表面的轻微正中嵴以前未被描述过。鉴定出六种丝状乳头亚型：舌尖上的长杆状；舌尖和舌体侧面区域的舌状且细长；正中线上的短暂圆锥状和叶状。附属突起为：长丝状、舌状和短暂圆锥状上有一对；叶状和细长状上有两对；大圆锥状乳头上有四对。两种菌状乳头亚型被凹槽包围且有味孔（椭圆形上有3 - 5个，圆形乳头上有5 - 9个）。在卵圆形轮廓乳头周围观察到U形环形沟，在圆形轮廓乳头周围观察到圆形沟。轮廓乳头有味孔（圆形轮廓乳头的背侧和侧面有8 - 14个，卵圆形轮廓乳头的侧面有6 - 10个）。
乳头系统的区域差异是为适应其粗糙和半粗糙的饮食而特化的。
