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Prenatal development of the tongue and its papillae in the one-humped camel (Cameleus dromedaries)Abd-Elnaeim* M.M.M., A. Kelany*, A.M. Doria+ & M.E. Abdel-Moneim**Dept. of Anatomy & Histology, Faculty of Vet. Med. Assiut University; +Dept. of Anatomy, Faculty of Med. Assiut University
ABSTRACTTongues were collected from 18 camel fetuses of different CVR lengths and studied morphologically, and then small pieces from different areas were collected and fixed in 3% glutraldehyde, examined and photographed by using scanning electron microscope.In the first group :The most rostral part of the apex was slightly narrow and there was a small constriction marking the apex from the body.The apex of the tongue was free from filiform papillae. Few fungiform papillae were seen developing near the lateral borders. A median linear cellular proliferation was demonstrated on the apex. Few papillary projections could be seen on the rostral part of the body. Vallate papillae laterally and lenticular papillae medially begin their first indication on the caudal part.In the second group :The tongue had nearly the same width and the constriction was not clearly seen. Numerous short filiform papillae were seen on the lateral parts of the apex and the rostral part of the body. Few fungiform papillae were sporadically scattered near the lateral borders of the apex and the body. On the torous linguae both lenticular and vallate papillae were easily demonstrated. Vallate papillae started to arrange themselves laterally in 2 rows on each side. The papillary grooves were formed by cellular breakdown around the papillary bodies. The lenticular papillae appeared covering the whole torous linguae except an area occupied by the vallate papillae.In the third group :The torous linguae, the median longitudinal groove and the lingual papillae were clearly differentiated.Filiform papillae were numerous on the rostral part of the body and apex. Lenticular papillae became larger in size with caudally directed pointed ends. They were arranged in 3-4 rows lateral to the vallate papillae and several rows in the paramedian zone. Fungiform papillae were similar to those of the second group but the papillary grooves were completely formed. Vallate papillae were about 5 to 6 on each side of the torous linguae, with circular to oval shape and completely formed papillary grooves. Taste pores were easily demonstrated on the surface of the papillary body.التطور الجنينى للسان وحلماته فى الجمل وحيد السنامبواسطةمحمد المحرزى عبد المنعم ، عبد الحكيم كيلانى ، درية عبدالله محمد زغلول ، محمود عبد النعيمأجرى هذا البحث على عدد ثمانية عشر لسانا لأجنة الجمال ذات الأطوال المختلفة حيث درست مورفولوجيا كما أخذت قطع صغيرة من أجزاء اللسان المختلفة وبعد تثبيتها وتجهيزها فحصت وصورت باستخدام الميكروسكوب الاليكترونى الماسح بعد تقسيم الأجنة إلى ثلاثة مجموعات أظهرت الدراسة أن معظم الجزء الأمامى من قمة اللسان ضيق نسبيا فى المجموعة الأولى كما تخلو قمة اللسان من الحلمات الخيطية.لوحظ فى هذه المجموعة ظهور قليل من الحلمات الفطرية بجوار الحافة الوحشية للسان وبداية ظهور الحلمات المتراسية والعدسية.أما المجموعة الثانية فقد تميزت بظهور العديد من الحلمات الخيطية الصغيرة وكذلك بزيادة اعداد الحلمات العدسية التى غطت كل المرتفع اللسانى عدا الجزء الذى توجد به الحلمات المتراسية.فى المجموعة الثالثة أمكن بوضوح تمييز المرتفع اللسانى والميزاب الطولى الوسطانى وكذلك الحلمات اللسانية. الحلمات الخيطية أصبحت عديدة على الجزء الأمامى لجسم وقمة اللسان كما ازدادت الحلمات العدسية فى الحجم وترتبت فى 3-4 صفوف على الجانب الوحشى للحلمات المتراسية بالإضافة إلى العديد من الصفوف على جانبى الخط الوسطانى. كما اشتملت هذه المجموعة على وجود 5-6 حلمات متراسية على كل جانب من المرتفع اللسانى التى يتراوح شكلها من الدائرى إلى البيضاوى ومحاطة بميزاب . أمكن بسهولة فى هذه المجموعة ملاحظة الفتحات التذوقية على سطح هذه الحلمات.* * * |
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Last Update 12-5-2007 |
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