انت هنا الان : شبكة جامعة بابل > موقع الكلية > نظام التعليم الالكتروني > مشاهدة المحاضرة
الكلية كلية الصيدلة
القسم فرع العلوم الاساسية
المرحلة 1
أستاذ المادة رفاه سليم حسن المطيري
10/05/2016 19:02:25
Digestive system I. LIPS The lips control access to the oral cavity from the outside environment. A. External Surface The external surface is covered with thin skin and therefore possesses hair follicles, sebaceous glands, and sweat glands. B. Transitional Zone The transitional zone (vermilion zone) is the pink area of the lip. Here the connective tissue papillae extend deep into the epidermis. Hair follicles and sweat glands are absent, whereas sebaceous glands are occasionally present. C. Mucous Membrane The vestibular aspect of the lip is lined by a wet epithelium (stratified squamous nonkeratinized) with numerous minor mixed salivary glands in the subepithelial connective tissue. D. Core of the Lip The core of the lip contains skeletal muscle. II. TONGUE The tongue is a muscular organ whose oral region is freely moving; its root is attached to the floor of the pharynx. Skeletal muscle forms the core of the tongue, among which groups of serous and seromucous glands are interspersed. A. Oral Region (Anterior Two-Thirds) The mucosa of the dorsal surface of the anterior two thirds of the tongue is modified to form four types of lingual papillae. 1. Filiform Papillae Filiform papillae are long and slender and are the most numerous. They form a roughened surface (especially in animals such as cats) and are distributed in parallel rows along the entire surface. They are covered by a parakeratinized stratified squamous epithelium (but bear no taste buds) over a connective tissue core. 2. Fungiform Papillae Fungiform papillae are mushroom-shaped, are scattered among the filiform papillae, and may be recognized by their appearance as red dots. They contain taste buds along their dorsal aspect. 3. Foliate Papillae Foliate papillae appear as longitudinal furrows along the side of the tongue near the posterior aspect of the anterior two-thirds. Their taste buds degenerate at an early age in humans. Serous glands of von Ebner are associated with these papillae.
المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .
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