Histomorphological investigations on the lips of Rahmani sheep (Ovis aries): A scanning electron and light microscopic study,Microscopy Research and Technique

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Histomorphological investigations on the lips of Rahmani sheep (Ovis aries): A scanning electron and light microscopic study
Microscopy Research and Technique ( IF 2.0 ) Pub Date : 2020-12-01 , DOI: 10.1002/jemt.23660
Fatma A Madkour ₁ , Elsayed S I Mohammed ₂

Affiliation

This study was conducted to provide comprehensive information on the anatomical and histological features of the upper (UL) and lower (LL) lips of Rahmani sheep by gross examination, morphometric analysis in addition to Light and scanning electron microscope (SEM). Samples from normal healthy adult male sheep heads were collected directly after slaughtering. UL and LL were dissected, and specimens were collected for both light and SEM. The UL was longer approximately by one‐fold and thicker by one‐fold at the median and the oral angle areas, and by one‐ and half‐folds at the paramedian area than the LL. The free border of both lips was characterized rostrally by the presence of labial projections. By SEM the edges of the inner aspect of the lips and of the philtrum were distinguished by labial projections. These projections which surrounding the philtrum subdivided into polygonal areas with numerous keratinized scales especially at the apical parts which increased dorsally toward the nostril. Most of the openings of the upper labial salivary glands were volcanic crater‐shaped while that of the lower labial salivary glands were various shapes; round folded margin, rosette and whirlpool shaped. Histologically, the shape of the projection or papillae differs at the median and paramedian areas of the UL than the LL. However, there was no differences near the oral angle area. In conclusion, the shape, size and amount of keratinization of the papillae may offer efficiency to the lips during feeding process.

中文翻译：

拉赫马尼羊（Ovis aries）嘴唇的组织形态学研究：扫描电子和光学显微镜研究

本研究的目的是通过肉眼检查、形态测量分析以及光学和扫描电子显微镜 (SEM) 来提供拉赫马尼羊上唇 (UL) 和下唇 (LL) 的解剖学和组织学特征的全面信息。屠宰后直接从正常健康成年雄性羊头采集样本。解剖 UL 和 LL，并收集样品用于光和 SEM。与 LL 相比，UL 在正中和口角区域大约长一倍，粗一倍，在旁正中区域大约厚一倍半。双唇游离缘的特征是存在唇侧突起。通过扫描电镜，嘴唇内部和人中的边缘通过唇部投影来区分。这些围绕人中的突起细分为具有许多角质化鳞片的多边形区域，特别是在向鼻孔背侧增加的顶端部分。上唇唾液腺开口多呈火山口状，下唇唾液腺开口呈各种形状；圆形折边，玫瑰花形和漩涡形。在组织学上，UL 的正中和旁正中区域的突起或乳头的形状与 LL 不同。然而，口角区域附近没有差异。总之，乳头的形状、大小和角化量可以在进食过程中提高嘴唇的效率。

更新日期：2020-12-01

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